Greater Sudbury weather in April

In April, Greater Sudbury sees average daytime highs of 10°C and overnight lows near -1°C, with 70 mm of precipitation across 9.8 wet days and about 13.3 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 6°C in the first days to 13°C by the end. The sky is clear or mostly clear about 24% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of April to 14 h 06 min by month's end. Set against the rest of the year, April is Greater Sudbury's 7th-clearest and 1st-windiest month. For the whole year in context, see Greater Sudbury's year-round climate.

Daytime high
10°
7th warmest
Overnight low
-1°
6th coldest
Precipitation
70 mm
9.8 wet days
Daylight
13 h 18 min
5:44 AM – 7:04 PM
Cloud cover
67%
7th clearest
Wind
13 km/h
1st windiest
Solar energy
4.95 kWh/m²
Travel score
2.1
out of 10

Greater Sudbury is city and unitary authority in Ontario, Canada.

Density
52/km²
people per km²
Founded
1893

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 6°C in the first days to 13°C by the end.

A typical April day in Greater Sudbury reaches about 10°C in the afternoon and slips back to -1°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 17°C. Set against its neighbours, April runs about 8°C warmer than March and about 8°C cooler than May.

-10°10°20°151015202530
Avg high (°C)Avg low (°C)
16-5
26-5
36-4
46-4
57-4
67-4
77-3
87-3
98-3
108-3
118-2
129-2
139-2
149-1
1510-1
1610-1
1710-1
18110
19110
20110
21110
22120
23121
24121
25121
26131
27131
28132
29142
30142

How April really feels in Greater Sudbury

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 30 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
30
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Greater Sudbury weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-7° / -17°5310.110.98.80.0
Feb-5° / -16°417.67.9100.0
Mar / -10°507.86.111.60.0
Apr10° / -1°709.83.913.32.1
May17° / 7210.60.414.85.4
Jun23° / 11°8110.8015.56.5
Jul25° / 14°8710.7015.26.8
Aug23° / 13°9011.20146.7
Sep19° / 9211012.45.7
Oct11° / 9412.70.910.72.3
Nov / -5°73116.39.20.1
Dec-4° / -12°59119.98.50.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 10% of April, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33565
43466
53466
63466
73466
83466
93367
103367
113466
123466
133367
143565
153565
163565
173565
183565
193664
203565
213565
223565
233565
243466
253466
263466
273565
283565
293565
303565

Chance of precipitation in April

Any precipitationSnow

Greater Sudbury gets around 70 mm of rain and snow over 9.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 32% and peaks near 33% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
12918
23018
33018
43118
53117
63117
73217
83216
93216
103215
113215
123214
133213
143212
153112
163111
173211
183211
193210
203210
213210
22329
23339
24339
25338
26338
27337
28337
29327
30326

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
241000
251000
261000
271000
281000
29991
30991

Wind in April

Winds average 13 km/h in April, the windiest month of the year.

Across April, 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.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 96 minutes over April. Sunrise moves from 6:14 AM to 5:20 AM, and sunset from 6:43 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:146:43
212.66:126:45
312.66:106:46
412.76:086:48
512.76:066:49
612.86:046:50
712.86:026:52
812.96:006:53
912.95:586:54
1013.05:566:56
1113.15:546:57
1213.15:526:59
1313.25:507:00
1413.25:487:01
1513.35:467:03
1613.35:447:04
1713.45:427:05
1813.45:417:07
1913.55:397:08
2013.55:377:09
2113.65:357:11
2213.65:337:12
2313.75:327:14
2413.85:307:15
2513.85:287:16
2613.95:267:18
2713.95:257:19
2814.05:237:20
2914.05:217:22
3014.15:207:23

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.95 kWh/m².

For context, solar energy here swings from a low near 1.18 kWh/m² to a high of 6.11 kWh/m² in June across the year — April's 4.95 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.6Bright
44.6Bright
54.6Bright
64.7Bright
74.7Bright
84.7Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.1Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.4Bright
305.4Bright
Planning a trip in April

Is April a good time to visit Greater Sudbury?

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

2.1
Sightseeing
7th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Greater Sudbury.

What to pack for Greater Sudbury in April

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

In April, Greater Sudbury sees daytime highs around 10°C and nights near -1°C. Pack a warm layer. Worth having: rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Greater Sudbury in April

The nearest coast averages about 2°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 69 km away) is warmest in August at about 19°C and coldest in March near 1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr2Bracing
May5Bracing
Jun11Bracing
Jul18Cool
Aug19Cool
Sep17Cool
Oct12Bracing
Nov8Bracing
Dec4Bracing

UV index in Greater Sudbury in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greater Sudbury peaks around June 20 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 highHighModerateLowJun 20UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun8Very high
Jul7Very high
Aug6High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Greater Sudbury?

Greater Sudbury sits at 46.5°N, 81.0°W, 266 m above sea level, in Canada. The nearest listed city is Valley East, 17 km away.

Topography around Greater Sudbury

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

Within 3 km, the terrain around Greater Sudbury has only modest variations in elevation — a maximum elevation change of 91 m around an average of 274 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 219 m; within 80 km, significant variations in elevation — a maximum elevation change of 411 m.

The land around Greater Sudbury is covered by trees (43%) and artificial surfaces (33%) within 3 km, trees (65%) within 16 km, and trees (82%) within 80 km.

3 km
91 m
16 km
219 m
80 km
411 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
April weather nearby: Valley East 17 km · North Bay 118 km · Huntsville 188 km · Bracebridge 208 km · Midland 212 km · Owen Sound 214 km · Timmins 221 km · Collingwood 231 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 Greater Sudbury (46.49°, -80.99°, elevation 266 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).