Pollen Monitor
Daily pollen insights

Daily pollen overview

Ontario pollen count

Latest detail and daily averages and peaks across all 390 captured day(s).

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Risk levels use category-specific National Allergy Bureau thresholds. Weed is labeled Ragweed because it is the sole weed species in the current multi-region dataset.

Latest daily detail

Tue, Oct 13, 2026. Daily averages and highest observed values.

America/Los_Angeles

Total

37

Average

51

Peak

Tree

None

0

Average

0

Peak

Grass

None

0

Average

0

Peak

Ragweed

High

37

Average

51

Peak

Values are modeled grains/m³. Risk badges use the daily peak for each category.

Species breakdown

Daily average grains/m³ for each reported allergen.

Tree

Ash0
Elm0
Oak0
Pine0
Birch0
Maple0
Mulberry0
Poplar/Cottonwood0
Cypress/Juniper/Cedar0

Grass

Grass0

Ragweed

Ragweed37

Complete daily history

Average and peak modeled grains/m³ for all 390 captured days. Scroll sideways on smaller screens.

Complete daily pollen averages and peaks, newest first
DateTotalTreeGrassRagweed
AveragePeakAveragePeakAveragePeakAveragePeak
Tue, Oct 13, 2026Latest375100003751
Mon, Oct 12, 2026447500004475
Sun, Oct 11, 202659119000059119
Sat, Oct 10, 202662115000062115
Fri, Oct 9, 2026699600006996
Thu, Oct 8, 2026679800006798
Wed, Oct 7, 202677105000077105
Tue, Oct 6, 202698125000098125
Mon, Oct 5, 20261061610000106161
Sun, Oct 4, 202679141000079141
Sat, Oct 3, 2026961527110089141
Fri, Oct 2, 20268212612190070107
Thu, Oct 1, 20269022926650065164
Wed, Sep 30, 20269517237660059106
Tue, Sep 29, 202695204481020048102
Mon, Sep 28, 2026921604680004680
Sun, Sep 27, 2026851204260004260
Sat, Sep 26, 2026731463673003673
Fri, Sep 25, 2026116324581620058162
Thu, Sep 24, 2026821424171004171
Wed, Sep 23, 2026841644282004282
Tue, Sep 22, 2026104226521130052113
Mon, Sep 21, 202696238481190048119
Sun, Sep 20, 2026107382541910054191
Sat, Sep 19, 2026891724486004486
Fri, Sep 18, 2026101226501130050113
Thu, Sep 17, 2026109210551050055105
Wed, Sep 16, 2026861664383004383
Tue, Sep 15, 2026891744487004487
Mon, Sep 14, 2026801764088004088
Sun, Sep 13, 2026851744387004387
Sat, Sep 12, 20261001485074005074
Fri, Sep 11, 20261091405470005470
Thu, Sep 10, 20261161565878005878
Wed, Sep 9, 20261011785089005089
Tue, Sep 8, 2026971824991004991
Mon, Sep 7, 2026691563578003578
Sun, Sep 6, 202668863443003443
Sat, Sep 5, 2026811824091004091
Fri, Sep 4, 2026911824591004591
Thu, Sep 3, 2026861623975004687
Wed, Sep 2, 2026741523470004082
Tue, Sep 1, 2026771693678004191
Mon, Aug 31, 20268313532526104573
Sun, Aug 30, 2026891263449794868
Sat, Aug 29, 2026921093542785059
Fri, Aug 28, 202658722228453239
Thu, Aug 27, 202666882534563648
Wed, Aug 26, 202658852333463246
Tue, Aug 25, 202650651925352735
Mon, Aug 24, 202645751829352541
Sun, Aug 23, 202640561622342230
Sat, Aug 22, 202636481419232026
Fri, Aug 21, 202645931736372450
Thu, Aug 20, 202637461418332025
Wed, Aug 19, 20264214316553112377
Tue, Aug 18, 202637491419332027
Mon, Aug 17, 202636441417232024
Sun, Aug 16, 202631441217231724
Sat, Aug 15, 202630351114221619
Fri, Aug 14, 202630351214221719
Thu, Aug 13, 202630401115231622
Wed, Aug 12, 202626311012221417
Tue, Aug 11, 202626361014221420
Mon, Aug 10, 20262429911121316
Sun, Aug 9, 20262431912121317
Sat, Aug 8, 20262228911121215
Fri, Aug 7, 20262328911121215
Thu, Aug 6, 20262127810121115
Wed, Aug 5, 20262128811121115
Tue, Aug 4, 20261927710121115
Mon, Aug 3, 202620266846912
Sun, Aug 2, 202620264668912
Sat, Aug 1, 2026212533911911
Fri, Jul 31, 20262026121114810
Thu, Jul 30, 20262231001420811
Wed, Jul 29, 20262029001319710
Tue, Jul 28, 20262129001419710
Mon, Jul 27, 20262128001318710
Sun, Jul 26, 2026202600131779
Sat, Jul 25, 20262128001318710
Fri, Jul 24, 20262628001718910
Thu, Jul 23, 20262328001518810
Wed, Jul 22, 20262328001518810
Tue, Jul 21, 20262429001619810
Mon, Jul 20, 20262229001419810
Sun, Jul 19, 20262229001419810
Sat, Jul 18, 20262229001519810
Fri, Jul 17, 20262329001519810
Thu, Jul 16, 20262442001527815
Wed, Jul 15, 20262631001720911
Tue, Jul 14, 20262128001418810
Mon, Jul 13, 20262528001618910
Sun, Jul 12, 202635400022261214
Sat, Jul 11, 20262634001722912
Fri, Jul 10, 20262434001622912
Thu, Jul 9, 202631400020261114
Wed, Jul 8, 202627340017221013
Tue, Jul 7, 2026172900591120
Mon, Jul 6, 20261849146151130
Sun, Jul 5, 20262139248151121
Sat, Jul 4, 20263212651613551455
Fri, Jul 3, 202623524101124920
Thu, Jul 2, 2026203659916611
Wed, Jul 1, 202625597151229615
Tue, Jun 30, 2026233279121658
Mon, Jun 29, 202626517131325613
Sun, Jun 28, 202624447111222511
Sat, Jun 27, 2026281008311446723
Fri, Jun 26, 20262441713121959
Thu, Jun 25, 202622496151123511
Wed, Jun 24, 202623396111219510
Tue, Jun 23, 202625547171225612
Mon, Jun 22, 202627688211331616
Sun, Jun 21, 202628668201431615
Sat, Jun 20, 202631839261538719
Fri, Jun 19, 20262439712122059
Thu, Jun 18, 202628548171427612
Wed, Jun 17, 202628548161426614
Tue, Jun 16, 2026261317401360631
Mon, Jun 15, 2026359310271745824
Sun, Jun 14, 202628988301445623
Sat, Jun 13, 20264010312321947924
Fri, Jun 12, 202631579181526713
Thu, Jun 11, 202642112122920541029
Wed, Jun 10, 2026369710251847825
Tue, Jun 9, 20264474122121381018
Mon, Jun 8, 202652132154125601231
Sun, Jun 7, 202668107233630491425
Sat, Jun 6, 202613028356131511092351
Fri, Jun 5, 202682191409829681326
Thu, Jun 4, 202675141438322401018
Wed, Jun 3, 20266313741851636616
Tue, Jun 2, 202675180541311431618
Mon, Jun 1, 2026113263892201837617
Sun, May 31, 202694298752391542517
Sat, May 30, 20268412566981323510
Fri, May 29, 2026101155791221628611
Thu, May 28, 202692194721511428615
Wed, May 27, 2026106167831271626714
Tue, May 26, 202699160781281628612
Mon, May 25, 202699175781331630514
Sun, May 24, 20261331821051442132715
Sat, May 23, 2026114207891631838715
Fri, May 22, 2026115266912221838616
Thu, May 21, 2026104189821471630616
Wed, May 20, 2026117281932281835718
Tue, May 19, 202692232721761537519
Mon, May 18, 20261292581022032047717
Sun, May 17, 202625355820749035621126
Sat, May 16, 202621943417736531591231
Fri, May 15, 20261262761002321950719
Thu, May 14, 202616636413230324491025
Wed, May 13, 20261515201204432267927
Tue, May 12, 20262711,7552281,63831831234
Mon, May 11, 20261694341353802551926
Sun, May 10, 20261594131263562549925
Sat, May 9, 202630079024871538671431
Fri, May 8, 202619247215440028621125
Thu, May 7, 20263081,3062631,19031761440
Wed, May 6, 20262143891883432143518
Tue, May 5, 20262617522387161731618
Mon, May 4, 2026325794313774922310
Sun, May 3, 20262981,2552911,24751437
Sat, May 2, 20262161,0462151,0460202
Fri, May 1, 20263741,1263741,1260000
Thu, Apr 30, 20262728472728470000
Wed, Apr 29, 20261645051645050000
Tue, Apr 28, 20261944311944310000
Mon, Apr 27, 20262256192256190000
Sun, Apr 26, 20264092,2674092,2670000
Sat, Apr 25, 20264539744539740000
Fri, Apr 24, 20264809654809650000
Thu, Apr 23, 20264661,8804661,8800000
Wed, Apr 22, 20265221,8235221,8230000
Tue, Apr 21, 20264911,7854911,7850000
Mon, Apr 20, 20264982,0524982,0520000
Sun, Apr 19, 20264182,3044182,3040000
Sat, Apr 18, 20263217863217860000
Fri, Apr 17, 20263097573097570000
Thu, Apr 16, 20265342,4505342,4500000
Wed, Apr 15, 20267723,8757723,8750000
Tue, Apr 14, 20265071,7645071,7640000
Mon, Apr 13, 20265172,9165172,9160000
Sun, Apr 12, 20266482,4156482,4150000
Sat, Apr 11, 20265622,0475622,0470000
Fri, Apr 10, 20267502,9857502,9850000
Thu, Apr 9, 20267733,2387733,2380000
Wed, Apr 8, 20267853,9567853,9560000
Tue, Apr 7, 20261,0235,8171,0235,8170000
Mon, Apr 6, 20267882,2697882,2690000
Sun, Apr 5, 20265341,7525341,7520000
Sat, Apr 4, 20261,0634,4011,0634,4010000
Fri, Apr 3, 20265522,4545522,4540000
Thu, Apr 2, 20268582,4408582,4400000
Wed, Apr 1, 20261,2346,2111,2346,2110000
Tue, Mar 31, 20261,5474,0911,5474,0910000
Mon, Mar 30, 20261,0134,6141,0134,6140000
Sun, Mar 29, 20269302,3539302,3530000
Sat, Mar 28, 20267223,1297223,1290000
Fri, Mar 27, 20261,2753,7061,2753,7060000
Thu, Mar 26, 20268253,5678253,5670000
Wed, Mar 25, 20269704,1089704,1080000
Tue, Mar 24, 20263401,8433401,8430000
Mon, Mar 23, 20268954,8178954,8170000
Sun, Mar 22, 20267432,0837432,0830000
Sat, Mar 21, 20266291,7546291,7540000
Fri, Mar 20, 20264981,3144981,3140000
Thu, Mar 19, 20263181,0543181,0540000
Wed, Mar 18, 20261333071333070000
Tue, Mar 17, 20263708503708500000
Mon, Mar 16, 20262951,4712951,4710000
Sun, Mar 15, 20261784241784240000
Sat, Mar 14, 20261151901151900000
Fri, Mar 13, 20261407181407180000
Thu, Mar 12, 20263283,2563283,2560000
Wed, Mar 11, 20262761,0992761,0990000
Tue, Mar 10, 20262706992706990000
Mon, Mar 9, 20261724251724250000
Sun, Mar 8, 20262226292226290000
Sat, Mar 7, 20262033972033970000
Fri, Mar 6, 20261424421424420000
Thu, Mar 5, 20262335182335180000
Wed, Mar 4, 20262901,2942901,2940000
Tue, Mar 3, 20263982,3033982,3030000
Mon, Mar 2, 20262616642616640000
Sun, Mar 1, 20261602361602360000
Sat, Feb 28, 20261614371614370000
Fri, Feb 27, 20261761,0221761,0220000
Thu, Feb 26, 20264071,7024071,7020000
Wed, Feb 25, 20262355862355860000
Tue, Feb 24, 20261636241636240000
Mon, Feb 23, 20261183021183020000
Sun, Feb 22, 20262005822005820000
Sat, Feb 21, 20261563661563660000
Fri, Feb 20, 20261272421272420000
Thu, Feb 19, 20261785461785460000
Wed, Feb 18, 20261524841524840000
Tue, Feb 17, 20261443241443240000
Mon, Feb 16, 20261877691877690000
Sun, Feb 15, 20261271991271990000
Sat, Feb 14, 20261342361342360000
Fri, Feb 13, 20263778883778880000
Thu, Feb 12, 20261102811102810000
Wed, Feb 11, 20261593331593330000
Tue, Feb 10, 20261484801484800000
Mon, Feb 9, 202650113501130000
Sun, Feb 8, 20261082021082020000
Sat, Feb 7, 202698261982610000
Fri, Feb 6, 20261203291203290000
Thu, Feb 5, 20261062301062300000
Wed, Feb 4, 2026509250920000
Tue, Feb 3, 20261011551011550000
Mon, Feb 2, 20261153231153230000
Sun, Feb 1, 2026467646760000
Sat, Jan 31, 202682156821560000
Fri, Jan 30, 20261065491065490000
Thu, Jan 29, 20261327981327980000
Wed, Jan 28, 202646122461220000
Tue, Jan 27, 202659146591460000
Mon, Jan 26, 202652173521730000
Sun, Jan 25, 202694477944770000
Sat, Jan 24, 20261142651142650000
Fri, Jan 23, 202665216652160000
Thu, Jan 22, 202675100751000000
Wed, Jan 21, 202678146781460000
Tue, Jan 20, 20261125171125170000
Mon, Jan 19, 2026408340830000
Sun, Jan 18, 20261225131225130000
Sat, Jan 17, 202664167641670000
Fri, Jan 16, 20261271,2461271,2460000
Thu, Jan 15, 20261101,1221101,1220000
Wed, Jan 14, 20261464861464860000
Tue, Jan 13, 202681353813530000
Mon, Jan 12, 20261645081645080000
Sun, Jan 11, 20263601,1833601,1830000
Sat, Jan 10, 202673124731240000
Fri, Jan 9, 20261056781056780000
Thu, Jan 8, 202672272722720000
Wed, Jan 7, 202676161761610000
Tue, Jan 6, 202668196681960000
Mon, Jan 5, 202658139581390000
Sun, Jan 4, 2026153415340000
Sat, Jan 3, 2026335633560000
Fri, Jan 2, 202624159241590000
Thu, Jan 1, 2026317931790000
Wed, Dec 31, 20251294141294140000
Tue, Dec 30, 202580173801730000
Mon, Dec 29, 20253251,8613251,8610000
Sun, Dec 28, 2025429642960000
Sat, Dec 27, 2025173217320000
Fri, Dec 26, 202562678626780000
Thu, Dec 25, 202535123351230000
Wed, Dec 24, 202570309703090000
Tue, Dec 23, 2025339933990000
Mon, Dec 22, 2025319231920000
Sun, Dec 21, 202549107491070000
Sat, Dec 20, 20251031,3981031,3980000
Fri, Dec 19, 2025417341730000
Thu, Dec 18, 2025327632760000
Wed, Dec 17, 202539174391740000
Tue, Dec 16, 20251881,6201881,6200000
Mon, Dec 15, 2025133513350000
Sun, Dec 14, 202532111321110000
Sat, Dec 13, 2025143114310000
Fri, Dec 12, 2025122612260000
Thu, Dec 11, 2025203220320000
Wed, Dec 10, 2025244824480000
Tue, Dec 9, 2025235723570000
Mon, Dec 8, 2025236623660000
Sun, Dec 7, 2025135612520017
Sat, Dec 6, 20252067144800519
Fri, Dec 5, 20251852103000822
Thu, Dec 4, 202524361015001421
Wed, Dec 3, 2025133631000926
Tue, Dec 2, 2025185327001747
Mon, Dec 1, 2025145300001453
Sun, Nov 30, 20259540000954
Sat, Nov 29, 2025176200001762
Fri, Nov 28, 2025133600001336
Thu, Nov 27, 2025243900002439
Wed, Nov 26, 2025258500002585
Tue, Nov 25, 2025162700001627
Mon, Nov 24, 20259210000921
Sun, Nov 23, 2025112700001127
Sat, Nov 22, 2025162700001627
Fri, Nov 21, 2025105700001057
Thu, Nov 20, 2025103900001039
Wed, Nov 19, 2025103600001036
Tue, Nov 18, 20257170000717
Mon, Nov 17, 20257180000718
Sun, Nov 16, 20257160000716
Sat, Nov 15, 20259260000926
Fri, Nov 14, 2025152800001528
Thu, Nov 13, 2025163300001633
Wed, Nov 12, 2025152600001526
Tue, Nov 11, 2025163500001635
Mon, Nov 10, 2025234100002341
Sun, Nov 9, 2025143000001430
Sat, Nov 8, 2025203300002033
Fri, Nov 7, 2025174700001747
Thu, Nov 6, 2025123100001231
Wed, Nov 5, 2025112300001123
Tue, Nov 4, 2025112600001126
Mon, Nov 3, 2025166000001660
Sun, Nov 2, 2025155800001558
Sat, Nov 1, 202533144000033144
Fri, Oct 31, 202553150000053150
Thu, Oct 30, 2025255200002552
Wed, Oct 29, 2025438100004381
Tue, Oct 28, 2025184400001844
Mon, Oct 27, 2025194100001941
Sun, Oct 26, 2025174200001742
Sat, Oct 25, 2025194200001942
Fri, Oct 24, 2025308500003085
Thu, Oct 23, 2025288200002882
Wed, Oct 22, 2025349900003499
Tue, Oct 21, 2025265000002650
Mon, Oct 20, 2025248300002483
Sun, Oct 19, 202529122000029122
Sat, Oct 18, 2025316200003162
Fri, Oct 17, 202545105000045105
Thu, Oct 16, 202539181000039181
Wed, Oct 15, 202532180000032180
Tue, Oct 14, 202520122000020122
Mon, Oct 13, 202544114000044114
Sun, Oct 12, 202562210000062210
Sat, Oct 11, 20251053270000105327
Fri, Oct 10, 2025254200002542
Thu, Oct 9, 202547184000047184
Wed, Oct 8, 202536138000036138
Tue, Oct 7, 202553206000053206
Mon, Oct 6, 202555195000055195
Sun, Oct 5, 202561203000061203
Sat, Oct 4, 202546166000046166
Fri, Oct 3, 202547232000047232
Thu, Oct 2, 202551142000051142
Wed, Oct 1, 202551158000051158
Tue, Sep 30, 202556200000056200
Mon, Sep 29, 202549197000049197
Sun, Sep 28, 202538112000038112
Sat, Sep 27, 202536105000036105
Fri, Sep 26, 202554228000054228
Thu, Sep 25, 202586196000086196
Wed, Sep 24, 20251052910000105291
Tue, Sep 23, 202586273000086273
Mon, Sep 22, 2025559100005591
Sun, Sep 21, 202561162000061162
Sat, Sep 20, 202593356000093356
Fri, Sep 19, 20251051970000105197