Rock Forest weather in May

In May, Rock Forest sees average daytime highs of 17°C and overnight lows near 7°C, with 113 mm of precipitation across 14.2 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 15°C in the first days to 19°C by the end. The sky is clear or mostly clear about 18% 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 Rock Forest's 6th-clearest and 8th-windiest month. For the whole year in context, see Rock Forest's year-round climate.

Daytime high
17°
5th warmest
Overnight low
8th coldest
Precipitation
113 mm
14.2 wet days
Daylight
14 h 42 min
4:24 AM – 7:05 PM
Cloud cover
69%
6th clearest
Wind
11 km/h
8th windiest
Solar energy
5.31 kWh/m²
Travel score
4.8
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 19°C by the end.

A typical May day in Rock Forest reaches about 17°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 10°C and 24°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)
1144
2144
3154
4154
5155
6155
7165
8165
9165
10165
11166
12166
13176
14176
15176
16176
17177
18177
19187
20187
21187
22188
23188
24188
25198
26198
27199
28199
29199
30199
31199

How May really feels in Rock Forest

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.

Rock Forest 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°7412.212.28.90.0
Feb-4° / -13°6310.310.910.10.0
Mar / -7°7912.29.211.60.0
Apr10° / 9612.74.413.22.0
May17° / 11314.20.514.64.8
Jun22° / 12°12814.1015.45.8
Jul24° / 14°11914.7015.16.2
Aug23° / 14°11413.7013.96.3
Sep19° / 10211.6012.35.7
Oct12° / 11813.21.510.72.9
Nov / -3°8912.96.99.30.3
Dec-2° / -9°8913.711.88.60.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33565
43565
53565
63664
73664
83664
93664
103763
113664
123664
133664
143664
153763
163763
173664
183664
193664
203664
213565
223565
233466
243565
253466
263466
273367
283367
293367
303268
313268

Chance of precipitation in May

Any precipitationSnow

Rock Forest gets around 113 mm of rain and snow over 14.2 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 45% and peaks near 50% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1445
2444
3434
4434
5433
6433
7433
8433
9443
10443
11442
12442
13442
14442
15442
16442
17442
18441
19451
20451
21461
22461
23471
24471
25481
26481
27490
28490
29500
30500
31500

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 92% 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
698200
797300
897300
997300
1097300
1197300
1297300
1396400
1496400
1596400
1694510
1794510
1894510
1992620
2092620
2190730
2290730
2388840
2487850
2586950
2686950
27841060
28831160
29821161
30811261
31801361

Wind in May

Winds average 11 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
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
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 4:44 AM to 4:10 AM, and sunset from 6:46 PM to 7:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:446:46
214.14:436:47
314.14:416:48
414.24:406:50
514.24:386:51
614.34:376:52
714.34:366:54
814.34:346:55
914.44:336:56
1014.44:316:57
1114.54:306:59
1214.54:297:00
1314.64:287:01
1414.64:267:02
1514.64:257:03
1614.74:247:05
1714.74:237:06
1814.84:227:07
1914.84:217:08
2014.84:207:09
2114.94:197:10
2214.94:187:11
2314.94:177:12
2415.04:167:13
2515.04:157:15
2615.04:147:16
2715.14:137:17
2815.14:127:18
2915.14:127:19
3015.14:117:20
3115.24:107:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.31 kWh/m².

For context, solar energy here swings from a low near 1.18 kWh/m² to a high of 5.72 kWh/m² in June across the year — May's 5.31 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.1Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Is May a good time to visit Rock Forest?

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

4.8
Sightseeing
5th-best month of the year
1.2
Beach & pool
5th-best month of the year

May is a reasonable time to visit Rock Forest for sightseeing.

What to pack for Rock Forest in May

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

In May, Rock Forest sees daytime highs around 17°C and nights near 7°C. Pack rain gear. Worth having: a warm layer and sun protection. About 14 days see rain.

rain geara warm layersun protection

UV index in Rock Forest 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 Rock Forest 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateModerateLowJul 13UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May6High
Jun6High
Jul8Very high
Aug3Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Rock Forest?

Rock Forest sits at 45.4°N, 72.0°W, 240 m above sea level, in Canada. The nearest listed city is Sherbrooke, 9.0 km away.

Topography around Rock Forest

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

Within 3 km, the terrain around Rock Forest has only modest variations in elevation — a maximum elevation change of 94 m around an average of 228 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 430 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,288 m.

The land around Rock Forest is covered by trees (68%) within 3 km, trees (66%) within 16 km, and trees (75%) within 80 km.

3 km
94 m
16 km
430 m
80 km
1,288 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Sherbrooke 9.0 km · Magog 16 km · Granby 58 km · Drummondville 70 km · Victoriaville 77 km · Saint-Hyacinthe 81 km · Mont-Saint-Hilaire 96 km · Beloeil 97 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 Rock Forest (45.357°, -71.9968°, elevation 240 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).