Saint-Constant weather in May

In May, Saint-Constant sees average daytime highs of 19°C and overnight lows near 8°C, with 104 mm of precipitation across 12 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 21°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 12 min by month's end. Set against the rest of the year, May is Saint-Constant's 5th-clearest and 8th-windiest month. For the whole year in context, see Saint-Constant's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Precipitation
104 mm
12 wet days
Daylight
14 h 42 min
4:30 AM – 7:11 PM
Cloud cover
66%
5th clearest
Wind
12 km/h
8th windiest
Solar energy
5.53 kWh/m²
Travel score
5.6
out of 10

Saint-Constant is city in Montérégie, Quebec, Canada.

Density
477/km²
people per km²
Founded
1855

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 16°C in the first days to 21°C by the end.

A typical May day in Saint-Constant reaches about 19°C in the afternoon and slips back to 8°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 26°C. Set against its neighbours, May runs about 7°C warmer than April and about 5°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1165
2165
3166
4176
5176
6176
7176
8177
9187
10187
11187
12187
13188
14198
15198
16198
17198
18199
19199
20209
21209
22209
232010
242010
252110
262110
272110
282111
292111
302111
312111

How May really feels in Saint-Constant

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.

Saint-Constant weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-5° / -13°7010.698.90.0
Feb-3° / -12°599.38.110.10.0
Mar / -6°7410.96.711.60.1
Apr11° / 10211.72.313.22.7
May19° / 10412014.65.6
Jun24° / 14°11812.6015.46.3
Jul26° / 16°11013015.16.2
Aug25° / 15°10812.2013.96.6
Sep21° / 11°9910.6012.36.3
Oct13° / 11211.90.510.73.5
Nov / -1°86123.39.30.6
Dec-1° / -8°8211.99.18.60.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53862
63862
73961
83961
94060
104060
114060
124159
134060
144159
154159
164060
174159
184159
194060
204159
214159
223961
233961
243961
253862
263862
273664
283664
293565
303565
313664

Chance of precipitation in May

Any precipitationSnow

Saint-Constant gets around 104 mm of rain and snow over 12 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 38% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1372
2361
3361
4361
5361
6361
7360
8360
9360
10360
11360
12360
13360
14360
15360
16360
17370
18370
19380
20380
21390
22390
23400
24400
25410
26410
27420
28420
29420
30420
31420

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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197300
296400
396400
495410
595410
695410
795410
894510
994510
1094510
1194510
1294510
1393610
1492620
1592620
1692620
1790730
1890730
1988840
2087940
2186950
22841051
23821161
24811261
25801361
26781471
27761572
28751672
29741772
30731872
31711982

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 4:51 AM to 4:17 AM, and sunset from 6:52 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:516:52
214.14:496:53
314.14:486:55
414.24:466:56
514.24:456:57
614.34:436:59
714.34:427:00
814.34:407:01
914.44:397:02
1014.44:387:04
1114.54:367:05
1214.54:357:06
1314.64:347:07
1414.64:337:08
1514.64:317:10
1614.74:307:11
1714.74:297:12
1814.84:287:13
1914.84:277:14
2014.84:267:15
2114.94:257:17
2214.94:247:18
2314.94:237:19
2415.04:227:20
2515.04:217:21
2615.04:207:22
2715.14:197:23
2815.14:197:24
2915.14:187:25
3015.14:177:26
3115.24:177:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.53 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 5.93 kWh/m² in July across the year — May's 5.53 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.7Bright
Planning a trip in May

Is May a good time to visit Saint-Constant?

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

5.6
Sightseeing
5th-best month of the year
2.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Saint-Constant for sightseeing.

What to pack for Saint-Constant in May

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

In May, Saint-Constant sees daytime highs around 19°C and nights near 8°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

UV index in Saint-Constant 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 Saint-Constant peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul8Very high
Aug4Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Constant?

Saint-Constant sits at 45.4°N, 73.6°W, 26 m above sea level, in Canada. The nearest listed city is Sainte-Catherine, 4.0 km away.

Topography around Saint-Constant

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

Within 3 km, the terrain around Saint-Constant has only modest variations in elevation — a maximum elevation change of 80 m around an average of 30 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 255 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,210 m.

The land around Saint-Constant is covered by artificial surfaces (30%), cropland (29%) and trees (22%) within 3 km, cropland (40%), trees (21%) and artificial surfaces (20%) within 16 km, and trees (44%) and cropland (38%) within 80 km.

3 km
80 m
16 km
255 m
80 km
1,210 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Sainte-Catherine 4.0 km · Candiac 4.0 km · La Prairie 8.0 km · Desmarchais-Crawford 9.0 km · Ville-Émard 10 km · Verdun 10 km · Ile-des-Soeurs 10 km · Saint-Henri 12 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 Saint-Constant (45.3668°, -73.5659°, elevation 26 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. 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).