Granby weather in May

In May, Granby sees average daytime highs of 18°C and overnight lows near 7°C, with 108 mm of precipitation across 12.9 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 20°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 Granby's 5th-clearest and 8th-windiest month. For the whole year in context, see Granby's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Precipitation
108 mm
12.9 wet days
Daylight
14 h 42 min
4:27 AM – 7:08 PM
Cloud cover
67%
5th clearest
Wind
12 km/h
8th windiest
Solar energy
5.46 kWh/m²
Travel score
5.3
out of 10

Granby is city in Estrie, Quebec, Canada.

Density
424/km²
people per km²
Founded
1859

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 20°C by the end.

A typical May day in Granby reaches about 18°C in the afternoon and slips back to 7°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 25°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)
1155
2155
3165
4165
5166
6166
7176
8176
9176
10176
11177
12187
13187
14187
15187
16187
17188
18198
19198
20198
21198
22199
23199
24209
25209
26209
272010
282010
292010
302010
312110

How May really feels in Granby

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.

Granby 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°7812.111.18.90.0
Feb-3° / -13°6410.19.410.10.0
Mar / -7°7811.47.711.60.1
Apr11° / 9912.3313.22.4
May18° / 10812.90.214.75.3
Jun23° / 13°11813.5015.46.2
Jul25° / 15°10813.7015.16.2
Aug24° / 14°11112.7013.96.6
Sep20° / 10°9810.9012.36.1
Oct13° / 11412.60.710.73.2
Nov / -2°9012.64.99.30.4
Dec-1° / -9°901310.38.60.0

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 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53961
63961
73961
84060
93961
103961
113961
123961
134060
144060
154060
164060
174159
184159
193961
204060
213961
223862
233862
243862
253664
263664
273664
283565
293565
303565
313565

Chance of precipitation in May

Any precipitationSnow

Granby gets around 108 mm of rain and snow over 12.9 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 41% and peaks near 46% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1402
2402
3392
4392
5392
6391
7391
8381
9381
10381
11381
12381
13381
14381
15381
16391
17391
18400
19400
20410
21420
22420
23430
24440
25440
26450
27450
28460
29460
30460
31460

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 (%)
197300
297300
396400
496400
596400
696400
796400
896400
996400
1094510
1194510
1294510
1394510
1494510
1594510
1692620
1792620
1892620
1990730
2089830
2188840
2286941
23841051
24841051
25821161
26811261
27791362
28781462
29771562
30761662
31751762

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 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
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2711calm
2811calm
2911calm
3011calm
3111calm

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 4:47 AM to 4:13 AM, and sunset from 6:49 PM to 7:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:476:49
214.14:466:50
314.14:446:52
414.24:436:53
514.24:416:54
614.34:406:55
714.34:386:57
814.34:376:58
914.44:366:59
1014.44:347:00
1114.54:337:02
1214.54:327:03
1314.64:307:04
1414.64:297:05
1514.64:287:06
1614.74:277:08
1714.74:267:09
1814.84:257:10
1914.84:237:11
2014.84:227:12
2114.94:217:13
2214.94:207:14
2314.94:197:16
2415.04:197:17
2515.04:187:18
2615.04:177:19
2715.14:167:20
2815.14:157:21
2915.14:147:22
3015.14:147:23
3115.24:137:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.46 kWh/m².

For context, solar energy here swings from a low near 1.2 kWh/m² to a high of 5.88 kWh/m² in June across the year — May's 5.46 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.2Bright
35.2Bright
45.2Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in May

Is May a good time to visit Granby?

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

5.3
Sightseeing
5th-best month of the year
1.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Granby for sightseeing.

What to pack for Granby in May

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

In May, Granby sees daytime highs around 18°C and nights near 7°C. Worth packing: a warm layer, rain gear and sun protection. About 13 days see rain.

a warm layerrain gearsun protection

UV index in Granby 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 Granby 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 Granby?

Granby sits at 45.4°N, 72.7°W, 102 m above sea level, in Canada. The nearest listed city is Saint-Hyacinthe, 31 km away.

Topography around Granby

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

Within 3 km, the terrain around Granby has only modest variations in elevation — a maximum elevation change of 97 m around an average of 120 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 511 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,288 m.

The land around Granby is covered by trees (41%) and artificial surfaces (40%) within 3 km, trees (54%) and cropland (30%) within 16 km, and trees (51%) and cropland (33%) within 80 km.

3 km
97 m
16 km
511 m
80 km
1,288 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Saint-Hyacinthe 31 km · Mont-Saint-Hilaire 40 km · Beloeil 41 km · Saint-Jean-sur-Richelieu 43 km · Chambly 43 km · Saint-Basile-le-Grand 45 km · Magog 48 km · Saint-Bruno-de-Montarville 50 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 Granby (45.4001°, -72.7324°, elevation 102 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).