Saint-Hyacinthe weather in May

In May, Saint-Hyacinthe sees average daytime highs of 19°C and overnight lows near 8°C, with 100 mm of precipitation across 12.4 wet days and about 14.7 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-Hyacinthe's 5th-clearest and 8th-windiest month. For the whole year in context, see Saint-Hyacinthe's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Precipitation
100 mm
12.4 wet days
Daylight
14 h 42 min
4:27 AM – 7:09 PM
Cloud cover
66%
5th clearest
Wind
12 km/h
8th windiest
Solar energy
5.52 kWh/m²
Travel score
5.6
out of 10

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-Hyacinthe 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 8°C warmer than April and about 5°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1165
2165
3165
4166
5176
6176
7176
8176
9187
10187
11187
12187
13187
14187
15198
16198
17198
18198
19198
20209
21209
22209
23209
24209
252010
262010
272110
282110
292110
302110
312111

How May really feels in Saint-Hyacinthe

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-Hyacinthe 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° / -14°7510.8108.90.0
Feb-4° / -13°619.28.410.10.0
Mar / -7°7410.6711.60.1
Apr11° / 9911.52.613.32.6
May19° / 10012.4014.75.6
Jun24° / 13°10812.5015.46.3
Jul26° / 16°10212.9015.16.2
Aug25° / 15°10612013.96.6
Sep20° / 10°9410.2012.36.3
Oct13° / 10911.40.610.73.4
Nov / -2°8711.43.99.30.5
Dec-2° / -9°8611.99.38.60.0

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 17% 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
73862
83862
93961
103961
113961
124060
134060
144060
154159
164159
174159
184159
194159
204060
214159
224159
234060
243961
253862
263862
273763
283763
293763
303763
313763

Chance of precipitation in May

Any precipitationSnow

Saint-Hyacinthe gets around 100 mm of rain and snow over 12.4 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 39% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1392
2381
3381
4381
5381
6371
7371
8370
9370
10370
11370
12370
13370
14370
15370
16370
17370
18380
19380
20390
21400
22400
23410
24410
25420
26420
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 90% 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
496400
596400
696400
795500
895500
995500
1095500
1194510
1294510
1394510
1494510
1594510
1693520
1793520
1891630
1991630
2090640
2189740
2287850
2386851
2484961
25831061
26821161
27821161
28801262
29791362
30781462
31771562

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
2412calm
2512calm
2612calm
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 4:48 AM to 4:13 AM, and sunset from 6:50 PM to 7:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:486:50
214.14:466:52
314.14:456:53
414.24:436:54
514.24:426:56
614.34:406:57
714.34:396:58
814.44:376:59
914.44:367:01
1014.54:357:02
1114.54:337:03
1214.54:327:04
1314.64:317:06
1414.64:297:07
1514.74:287:08
1614.74:277:09
1714.74:267:10
1814.84:257:12
1914.84:247:13
2014.94:237:14
2114.94:227:15
2214.94:217:16
2315.04:207:17
2415.04:197:18
2515.04:187:19
2615.14:177:20
2715.14:167:21
2815.14:157:22
2915.14:157:23
3015.24:147:24
3115.24:137:25

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.52 kWh/m².

For context, solar energy here swings from a low near 1.25 kWh/m² to a high of 5.93 kWh/m² in June across the year — May's 5.52 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-Hyacinthe?

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-Hyacinthe for sightseeing.

What to pack for Saint-Hyacinthe in May

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

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

a warm layerrain gearsun protection

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul8Very high
Aug3Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Hyacinthe?

Saint-Hyacinthe sits at 45.6°N, 73.0°W, 32 m above sea level, in Canada. The nearest listed city is Mont-Saint-Hilaire, 19 km away.

Topography around Saint-Hyacinthe

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

Within 3 km, the terrain around Saint-Hyacinthe has only modest variations in elevation — a maximum elevation change of 35 m around an average of 34 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 266 m; within 80 km, large variations in elevation — a maximum elevation change of 1,096 m.

The land around Saint-Hyacinthe is covered by artificial surfaces (41%) and cropland (27%) within 3 km, cropland (75%) within 16 km, and trees (44%) and cropland (40%) within 80 km.

3 km
35 m
16 km
266 m
80 km
1,096 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Mont-Saint-Hilaire 19 km · Beloeil 21 km · Saint-Basile-le-Grand 28 km · Sainte-Julie 30 km · Granby 31 km · Chambly 32 km · Saint-Bruno-de-Montarville 32 km · Varennes 37 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-Hyacinthe (45.6308°, -72.957°, elevation 32 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).