Cornwall weather in April

In April, Cornwall sees average daytime highs of 12°C and overnight lows near 2°C, with 101 mm of precipitation across 12.1 wet days and about 13.2 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 8°C in the first days to 15°C by the end. The sky is clear or mostly clear about 20% 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 hours by month's end. Set against the rest of the year, April is Cornwall's 9th-clearest and 4th-windiest month. For the whole year in context, see Cornwall's year-round climate.

Daytime high: 12°; 7th warmest
Overnight low: 2°; 6th coldest
Precipitation: 101 mm; 12.1 wet days
Daylight: 13 h 18 min; 5:21 AM – 6:37 PM
Cloud cover: 70%; 9th clearest
Wind: 12 km/h; 4th windiest
Solar energy: 4.67 kWh/m²
Travel score: 2.8; out of 10

Cornwall is city in Ontario, Canada.

Air quality: Good; PM2.5 6 µg/m³ · 2019
Density: 793/km²; people per km²
Founded: 1784

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

← March Cornwall year-round climate May →Best places to visit in April

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 8°C in the first days to 15°C by the end.

A typical April day in Cornwall reaches about 12°C in the afternoon and slips back to 2°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 19°C. Set against its neighbours, April runs about 9°C warmer than March and about 7°C cooler than May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	8	8	8	8	9	9	9	10	10	10	11	11	11	11	12	12	12	13	13	13	13	14	14	14	14	15	15	15	15	16
Avg low (°C)	-1	-1	-1	-1	0	0	0	0	0	1	1	1	1	2	2	2	2	2	3	3	3	3	3	4	4	4	4	5	5	5

	Avg high (°C)	Avg low (°C)
1	8	-1
2	8	-1
3	8	-1
4	8	-1
5	9	0
6	9	0
7	9	0
8	10	0
9	10	0
10	10	1
11	11	1
12	11	1
13	11	1
14	11	2
15	12	2
16	12	2
17	12	2
18	13	2
19	13	3
20	13	3
21	13	3
22	14	3
23	14	3
24	14	4
25	14	4
26	15	4
27	15	4
28	15	5
29	15	5
30	16	5

How April really feels in Cornwall

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 21 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Cornwall weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-4° / -12°	73	11.4	10.5	9	0.0
Feb	-2° / -12°	61	10	8.7	10.1	0.0
Mar	3° / -6°	76	11.2	7	11.6	0.2
Apr	12° / 2°	101	12.1	2.8	13.2	2.8
May	19° / 8°	98	12.2	0.1	14.6	5.6
Jun	24° / 13°	105	12.4	0	15.4	6.3
Jul	26° / 16°	100	12.9	0	15.1	6.2
Aug	25° / 15°	94	11.6	0	13.9	6.6
Sep	21° / 11°	93	10.5	0	12.3	6.4
Oct	13° / 5°	105	12	0.6	10.7	3.6
Nov	6° / -1°	84	12.4	3.7	9.3	0.6
Dec	-0° / -7°	82	12.4	9.3	8.6	0.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 68%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	33	32	32	31	31	32	32	32	31	32	32	32	31	31	32	31	31	31	31	31	31	31	31	32	33	33	33	33	34	34
Cloudier (%)	67	68	68	69	69	68	68	68	69	68	68	68	69	69	68	69	69	69	69	69	69	69	69	68	67	67	67	67	66	66

	Clearer (%)	Cloudier (%)
1	33	67
2	32	68
3	32	68
4	31	69
5	31	69
6	32	68
7	32	68
8	32	68
9	31	69
10	32	68
11	32	68
12	32	68
13	31	69
14	31	69
15	32	68
16	31	69
17	31	69
18	31	69
19	31	69
20	31	69
21	31	69
22	31	69
23	31	69
24	32	68
25	33	67
26	33	67
27	33	67
28	33	67
29	34	66
30	34	66

Chance of precipitation in April

Any precipitationSnow

Cornwall gets around 101 mm of rain and snow over 12.1 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 40% and peaks near 41% on the wettest days, and about 3 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	39	40	40	40	40	40	40	40	40	39	39	39	39	39	39	39	39	39	40	40	40	40	40	41	41	41	41	41	41	40
Snow chance (%)	14	14	14	14	14	13	13	13	13	12	11	11	10	9	9	8	8	7	7	7	6	6	5	5	4	4	3	3	3	2

	Rain chance (%)	Snow chance (%)
1	39	14
2	40	14
3	40	14
4	40	14
5	40	14
6	40	13
7	40	13
8	40	13
9	40	13
10	39	12
11	39	11
12	39	11
13	39	10
14	39	9
15	39	9
16	39	8
17	39	8
18	39	7
19	40	7
20	40	7
21	40	6
22	40	6
23	40	5
24	41	5
25	41	4
26	41	4
27	41	3
28	41	3
29	41	3
30	40	2

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99	99	99	99	99	99	98	98	98	98	98	98	97	97	96
Comfortable (%)	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	3	3	4

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	98	2
23	98	2
24	98	2
25	98	2
26	98	2
27	98	2
28	97	3
29	97	3
30	96	4

Wind in April

Winds average 12 km/h in April.

Across April, 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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	11	11	11
Feels	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	light breeze
9	12	light breeze
10	12	light breeze
11	12	light breeze
12	12	light breeze
13	12	light breeze
14	12	light breeze
15	12	light breeze
16	12	light breeze
17	12	light breeze
18	12	light breeze
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	11	calm
29	11	calm
30	11	calm

Sunrise & sunset in April

DaylightNight

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

Days grow by about 90 minutes over April. Sunrise moves from 5:49 AM to 4:58 AM, and sunset from 6:18 PM to 6:55 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.5	12.5	12.6	12.6	12.7	12.7	12.8	12.8	12.9	12.9	13.0	13.1	13.1	13.2	13.2	13.3	13.3	13.4	13.4	13.5	13.5	13.6	13.6	13.7	13.7	13.8	13.8	13.9	13.9	14.0
Sunrise (AM)	5:49	5:48	5:46	5:44	5:42	5:40	5:38	5:36	5:34	5:32	5:30	5:29	5:27	5:25	5:23	5:21	5:20	5:18	5:16	5:14	5:13	5:11	5:09	5:07	5:06	5:04	5:02	5:01	4:59	4:58
Sunset (PM)	6:18	6:19	6:20	6:22	6:23	6:24	6:25	6:27	6:28	6:29	6:31	6:32	6:33	6:34	6:36	6:37	6:38	6:40	6:41	6:42	6:43	6:45	6:46	6:47	6:48	6:50	6:51	6:52	6:54	6:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.5	5:49	6:18
2	12.5	5:48	6:19
3	12.6	5:46	6:20
4	12.6	5:44	6:22
5	12.7	5:42	6:23
6	12.7	5:40	6:24
7	12.8	5:38	6:25
8	12.8	5:36	6:27
9	12.9	5:34	6:28
10	12.9	5:32	6:29
11	13.0	5:30	6:31
12	13.1	5:29	6:32
13	13.1	5:27	6:33
14	13.2	5:25	6:34
15	13.2	5:23	6:36
16	13.3	5:21	6:37
17	13.3	5:20	6:38
18	13.4	5:18	6:40
19	13.4	5:16	6:41
20	13.5	5:14	6:42
21	13.5	5:13	6:43
22	13.6	5:11	6:45
23	13.6	5:09	6:46
24	13.7	5:07	6:47
25	13.7	5:06	6:48
26	13.8	5:04	6:50
27	13.8	5:02	6:51
28	13.9	5:01	6:52
29	13.9	4:59	6:54
30	14.0	4:58	6:55

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.67 kWh/m².

For context, solar energy here swings from a low near 1.2 kWh/m² to a high of 5.91 kWh/m² in June across the year — April's 4.67 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.2	4.3	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.1	5.1	5.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.3	Bright
3	4.3	Bright
4	4.3	Bright
5	4.3	Bright
6	4.4	Bright
7	4.4	Bright
8	4.5	Bright
9	4.5	Bright
10	4.5	Bright
11	4.6	Bright
12	4.6	Bright
13	4.6	Bright
14	4.7	Bright
15	4.7	Bright
16	4.7	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.9	Bright
22	4.9	Bright
23	4.9	Bright
24	5.0	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	5.1	Bright
29	5.1	Bright
30	5.1	Bright

Planning a trip in April

Is April a good time to visit Cornwall?

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

2.8

Sightseeing

7th-best month of the year

0.1

Beach & pool

7th-best month of the year

April is a weaker month for outdoor sightseeing in Cornwall.

What to pack for Cornwall in April

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

In April, Cornwall sees daytime highs around 12°C and nights near 2°C. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

UV index in Cornwall in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cornwall peaks around July 14 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	3	4	6	6	8	4	5	3	2	1
Level	Low	Low	Moderate	Moderate	High	High	Very high	Moderate	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	3	Moderate
Apr	4	Moderate
May	6	High
Jun	6	High
Jul	8	Very high
Aug	4	Moderate
Sep	5	High
Oct	3	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Cornwall?

Cornwall sits at 45.0°N, 74.7°W, 59 m above sea level, in Canada. The nearest listed city is Les Coteaux, 49 km away.

Topography around Cornwall

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

Within 3 km, the terrain around Cornwall has only modest variations in elevation — a maximum elevation change of 40 m around an average of 58 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 100 m; within 80 km, large variations in elevation — a maximum elevation change of 1,164 m.

The land around Cornwall is covered by trees (35%) and artificial surfaces (26%) within 3 km, trees (51%) within 16 km, and trees (58%) and cropland (28%) within 80 km.

3 km

40 m

trees 35%

16 km

100 m

trees 51%

80 km

1,164 m

trees 58%

treesgrasslandcroplandartificial surfaceswaterwetland

← March Cornwall year-round climate May →Best places to visit in April

April weather nearby: Les Coteaux 49 km · Salaberry-de-Valleyfield 53 km · Saint-Lazare 63 km · Vaudreuil-Dorion 69 km · Clarence-Rockland 74 km · Orléans 78 km · Fallingbrook 78 km · Gloucester 80 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

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 Cornwall (45.0181°, -74.7281°, elevation 59 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).

	Avg high (°C)	Avg low (°C)
1	8	-1
2	8	-1
3	8	-1
4	8	-1
5	9	0
6	9	0
7	9	0
8	10	0
9	10	0
10	10	1
11	11	1
12	11	1
13	11	1
14	11	2
15	12	2
16	12	2
17	12	2
18	13	2
19	13	3
20	13	3
21	13	3
22	14	3
23	14	3
24	14	4
25	14	4
26	15	4
27	15	4
28	15	5
29	15	5
30	16	5

	Clearer (%)	Cloudier (%)
1	33	67
2	32	68
3	32	68
4	31	69
5	31	69
6	32	68
7	32	68
8	32	68
9	31	69
10	32	68
11	32	68
12	32	68
13	31	69
14	31	69
15	32	68
16	31	69
17	31	69
18	31	69
19	31	69
20	31	69
21	31	69
22	31	69
23	31	69
24	32	68
25	33	67
26	33	67
27	33	67
28	33	67
29	34	66
30	34	66

	Rain chance (%)	Snow chance (%)
1	39	14
2	40	14
3	40	14
4	40	14
5	40	14
6	40	13
7	40	13
8	40	13
9	40	13
10	39	12
11	39	11
12	39	11
13	39	10
14	39	9
15	39	9
16	39	8
17	39	8
18	39	7
19	40	7
20	40	7
21	40	6
22	40	6
23	40	5
24	41	5
25	41	4
26	41	4
27	41	3
28	41	3
29	41	3
30	40	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	98	2
23	98	2
24	98	2
25	98	2
26	98	2
27	98	2
28	97	3
29	97	3
30	96	4

	Avg high (°C)	Avg low (°C)
1	8	-1
2	8	-1
3	8	-1
4	8	-1
5	9	0
6	9	0
7	9	0
8	10	0
9	10	0
10	10	1
11	11	1
12	11	1
13	11	1
14	11	2
15	12	2
16	12	2
17	12	2
18	13	2
19	13	3
20	13	3
21	13	3
22	14	3
23	14	3
24	14	4
25	14	4
26	15	4
27	15	4
28	15	5
29	15	5
30	16	5

	Clearer (%)	Cloudier (%)
1	33	67
2	32	68
3	32	68
4	31	69
5	31	69
6	32	68
7	32	68
8	32	68
9	31	69
10	32	68
11	32	68
12	32	68
13	31	69
14	31	69
15	32	68
16	31	69
17	31	69
18	31	69
19	31	69
20	31	69
21	31	69
22	31	69
23	31	69
24	32	68
25	33	67
26	33	67
27	33	67
28	33	67
29	34	66
30	34	66

	Rain chance (%)	Snow chance (%)
1	39	14
2	40	14
3	40	14
4	40	14
5	40	14
6	40	13
7	40	13
8	40	13
9	40	13
10	39	12
11	39	11
12	39	11
13	39	10
14	39	9
15	39	9
16	39	8
17	39	8
18	39	7
19	40	7
20	40	7
21	40	6
22	40	6
23	40	5
24	41	5
25	41	4
26	41	4
27	41	3
28	41	3
29	41	3
30	40	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	98	2
23	98	2
24	98	2
25	98	2
26	98	2
27	98	2
28	97	3
29	97	3
30	96	4

	Avg high (°C)	Avg low (°C)
1	8	-1
2	8	-1
3	8	-1
4	8	-1
5	9	0
6	9	0
7	9	0
8	10	0
9	10	0
10	10	1
11	11	1
12	11	1
13	11	1
14	11	2
15	12	2
16	12	2
17	12	2
18	13	2
19	13	3
20	13	3
21	13	3
22	14	3
23	14	3
24	14	4
25	14	4
26	15	4
27	15	4
28	15	5
29	15	5
30	16	5

	Clearer (%)	Cloudier (%)
1	33	67
2	32	68
3	32	68
4	31	69
5	31	69
6	32	68
7	32	68
8	32	68
9	31	69
10	32	68
11	32	68
12	32	68
13	31	69
14	31	69
15	32	68
16	31	69
17	31	69
18	31	69
19	31	69
20	31	69
21	31	69
22	31	69
23	31	69
24	32	68
25	33	67
26	33	67
27	33	67
28	33	67
29	34	66
30	34	66

	Rain chance (%)	Snow chance (%)
1	39	14
2	40	14
3	40	14
4	40	14
5	40	14
6	40	13
7	40	13
8	40	13
9	40	13
10	39	12
11	39	11
12	39	11
13	39	10
14	39	9
15	39	9
16	39	8
17	39	8
18	39	7
19	40	7
20	40	7
21	40	6
22	40	6
23	40	5
24	41	5
25	41	4
26	41	4
27	41	3
28	41	3
29	41	3
30	40	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	98	2
23	98	2
24	98	2
25	98	2
26	98	2
27	98	2
28	97	3
29	97	3
30	96	4