Mississauga weather in May

In May, Mississauga sees average daytime highs of 16°C and overnight lows near 8°C, with 81 mm of rain across 11 wet days and about 14.5 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 19°C by the end. The sky is clear or mostly clear about 27% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of May to 15 hours by month's end. Set against the rest of the year, May is Mississauga's 5th-clearest and 9th-windiest month. For the whole year in context, see Mississauga's year-round climate.

Daytime high
16°
5th warmest
Overnight low
8th coldest
Rainfall
81 mm
11 wet days
Daylight
14 h 30 min
5:00 AM – 7:30 PM
Cloud cover
62%
5th clearest
Wind
12 km/h
9th windiest
Solar energy
5.88 kWh/m²
Travel score
5.0
out of 10

Mississauga is city in Ontario, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Founded
1968

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 19°C by the end.

A typical May day in Mississauga reaches about 16°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 23°C. Set against its neighbours, May runs about 6°C warmer than April and about 6°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1135
2136
3146
4146
5146
6146
7147
8157
9157
10157
11157
12157
13168
14168
15168
16168
17168
18178
19179
20179
21179
22189
231810
241810
251810
261910
271911
281911
291911
301911
311911

How May really feels in Mississauga

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mississauga weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°70118.59.10.0
Feb-0° / -7°558.66.610.20.0
Mar / -3°659.64.911.60.2
Apr10° / 8911.3213.22.3
May16° / 8111014.55.0
Jun22° / 14°8211.3015.26.5
Jul25° / 18°7410.1014.96.8
Aug25° / 17°669.4013.87.1
Sep21° / 13°759.2012.36.6
Oct14° / 8311.10.110.84.0
Nov / 7710.22.69.51.0
Dec / -3°7010.56.38.80.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24258
34258
44258
54258
64258
74258
84258
94258
104258
114258
124258
134357
144357
154357
164357
174357
184456
194456
204456
214555
224654
234654
244753
254753
264753
274753
284753
294753
304753
314753

Chance of precipitation in May

Any precipitation

Mississauga gets around 81 mm of rain over 11 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
737
836
936
1036
1136
1236
1336
1436
1536
1635
1735
1835
1935
2034
2134
2234
2334
2434
2534
2634
2734
2834
2934
3034
3134

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
198200
298200
398200
498200
598200
697300
797300
897300
997300
1096400
1195410
1295410
1394510
1494510
1593610
1693610
1791720
1891720
1989830
2088930
2187940
22851041
23831151
24821161
25811261
26791371
27791371
28771472
29761482
30751582
31751582

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 54 min at the start of May to 15 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:19 AM to 4:47 AM, and sunset from 7:13 PM to 7:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:197:13
213.95:177:14
314.05:167:15
414.05:157:16
514.15:137:18
614.15:127:19
714.25:107:20
814.25:097:21
914.25:087:22
1014.35:077:23
1114.35:057:25
1214.45:047:26
1314.45:037:27
1414.45:027:28
1514.55:017:29
1614.55:007:30
1714.54:597:31
1814.64:587:32
1914.64:577:33
2014.64:567:34
2114.74:557:35
2214.74:547:37
2314.74:537:38
2414.84:527:39
2514.84:517:40
2614.84:507:40
2714.94:507:41
2814.94:497:42
2914.94:487:43
3014.94:487:44
3115.04:477:45

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.88 kWh/m².

For context, solar energy here swings from a low near 1.3 kWh/m² to a high of 6.25 kWh/m² in June across the year — May's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Is May a good time to visit Mississauga?

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

5.0
Sightseeing
5th-best month of the year
1.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Mississauga for sightseeing.

What to pack for Mississauga in May

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

In May, Mississauga sees daytime highs around 16°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Mississauga in May

The nearest coast averages about 8°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 22 to Sep 1 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May8Bracing
Jun15Cool
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Mississauga in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mississauga peaks around June 21 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 21UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Mississauga?

Mississauga sits at 43.6°N, 79.7°W, 159 m above sea level, in Canada. The nearest listed city is Etobicoke, 10 km away.

Topography around Mississauga

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

Within 3 km, the terrain around Mississauga has only modest variations in elevation — a maximum elevation change of 102 m around an average of 151 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 459 m.

The land around Mississauga is covered by artificial surfaces (62%) and trees (28%) within 3 km, artificial surfaces (40%) within 16 km, and cropland (29%), trees (26%) and water (22%) within 80 km.

3 km
102 m
16 km
191 m
80 km
459 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Etobicoke 10 km · Eringate-Centennial-West Deane 11 km · Islington-City Centre West 11 km · Mimico 12 km · Stonegate-Queensway 14 km · Willowridge-Martingrove-Richview 14 km · Oakville 14 km · Brampton 15 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 Mississauga (43.5789°, -79.6583°, elevation 159 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).