Alliston weather in March

In March, Alliston sees average daytime highs of 4°C and overnight lows near -5°C, with 54 mm of precipitation across 10.1 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 1°C in the first days to 7°C by the end. The sky is clear or mostly clear about 23% of the time in March, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Alliston's 8th-clearest and 1st-windiest month. For the whole year in context, see Alliston's year-round climate.

Daytime high
9th warmest
Overnight low
-5°
4th coldest
Precipitation
54 mm
10.1 wet days
Daylight
11 h 36 min
6:40 AM – 6:18 PM
Cloud cover
68%
8th clearest
Wind
13 km/h
1st windiest
Solar energy
3.89 kWh/m²
Travel score
0.2
out of 10

Alliston is settlement in Simcoe County, Ontario, Canada.

Founded
1874

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 1°C in the first days to 7°C by the end.

A typical March day in Alliston reaches about 4°C in the afternoon and slips back to -5°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between -4°C and 13°C. Set against its neighbours, March runs about 5°C warmer than February and about 8°C cooler than April.

-20°-10°10°20°151015202531
Avg high (°C)Avg low (°C)
10-9
21-9
31-9
41-8
51-8
61-8
72-8
82-7
92-7
102-7
113-7
123-6
133-6
143-6
154-6
164-5
174-5
184-5
195-5
205-4
215-4
225-4
236-4
246-3
256-3
266-3
277-2
287-2
297-2
307-2
318-2

How March really feels in Alliston

Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
18 feel bitter (≤ -10°C)

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

Alliston weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -11°5610.410.29.10.0
Feb-2° / -11°468.47.610.20.0
Mar / -5°5410.16.111.60.2
Apr11° / 7410.82.713.22.8
May18° / 8010.7014.55.7
Jun23° / 13°8310.9015.26.7
Jul26° / 15°7510.60156.7
Aug25° / 14°769.8013.87.0
Sep21° / 10°719.7012.36.5
Oct13° / 7311.20.410.83.6
Nov / -1°6710.74.19.40.6
Dec / -7°5710.998.70.0

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 10% of March, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32773
42971
52971
62971
72971
83070
93169
103268
113367
123367
133367
143367
153466
163466
173466
183466
193565
203565
213565
223565
233565
243565
253466
263565
273565
283565
293565
303466
313466

Chance of precipitation in March

Any precipitationSnow

Alliston gets around 54 mm of rain and snow over 10.1 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 33% and peaks near 35% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13427
23427
33427
43427
53426
63426
73426
83425
93424
103324
113323
123222
133221
143221
153120
163119
173119
183018
193017
203017
213016
223016
233115
243115
253215
263215
273315
283415
293415
303515
313515

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in March

Winds average 13 km/h in March, the windiest month of the year.

Across March, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 10 h 54 min at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over March. Sunrise moves from 7:07 AM to 6:12 AM, and sunset from 5:58 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:075:58
210.97:056:00
311.07:046:01
411.07:026:02
511.17:006:04
611.16:596:05
711.26:576:06
811.26:556:07
911.36:536:09
1011.36:516:10
1111.46:506:11
1211.46:486:13
1311.56:466:14
1411.56:446:15
1511.66:426:17
1611.66:406:18
1711.76:396:19
1811.76:376:20
1911.86:356:22
2011.86:336:23
2111.96:316:24
2211.96:296:25
2312.06:276:27
2412.06:266:28
2512.16:246:29
2612.16:226:30
2712.26:206:32
2812.26:186:33
2912.36:166:34
3012.46:146:35
3112.46:126:37

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 3.89 kWh/m².

For context, solar energy here swings from a low near 1.24 kWh/m² to a high of 6.3 kWh/m² in June across the year — March's 3.89 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.3Moderate
43.3Moderate
53.4Moderate
63.4Moderate
73.5Moderate
83.5Moderate
93.6Moderate
103.6Moderate
113.7Moderate
123.8Moderate
133.8Moderate
143.9Moderate
153.9Moderate
163.9Moderate
174.0Moderate
184.0Bright
194.1Bright
204.1Bright
214.1Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.4Bright
Planning a trip in March

Is March a good time to visit Alliston?

Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.2
Sightseeing
9th-best month of the year
0.0
Beach & pool
8th-best month of the year

March is a weaker month for outdoor sightseeing in Alliston.

What to pack for Alliston in March

From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In March, Alliston sees daytime highs around 4°C and nights near -5°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Alliston in March

The nearest coast averages about 1°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 57 km away) is warmest in August at about 21°C and coldest in March near 1°C.

It's comfortable for a long swim from Aug 9 to Aug 24 — about 0.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar1Bracing
Apr2Bracing
May5Bracing
Jun11Bracing
Jul19Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Alliston in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alliston peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Alliston in March

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.

Air quality in Alliston is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 2019 µg/m³Nov 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar16Moderate
Apr17Moderate
May19Moderate
Jun18Moderate
Jul18Moderate
Aug16Moderate
Sep14Moderate
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Alliston?

Alliston sits at 44.2°N, 79.9°W, 223 m above sea level, in Canada. The nearest listed city is Innisfil, 24 km away.

Topography around Alliston

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Alliston.

Within 3 km, the terrain around Alliston has only modest variations in elevation — a maximum elevation change of 71 m around an average of 227 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 266 m; within 80 km, significant variations in elevation — a maximum elevation change of 471 m.

The land around Alliston is covered by cropland (37%), grassland (24%) and trees (20%) within 3 km, cropland (42%), trees (35%) and grassland (21%) within 16 km, and trees (37%) and cropland (29%) within 80 km.

3 km
71 m
16 km
266 m
80 km
471 m
treesgrasslandcroplandartificial surfacesbare terrainwater
March weather nearby: Innisfil 24 km · Bolton 32 km · Orangeville 32 km · Barrie 32 km · Caledon 33 km · Keswick 34 km · Newmarket 34 km · East Gwillimbury 35 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Alliston (44.1501°, -79.8663°, elevation 223 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).