Grimsby weather in April

In April, Grimsby sees average daytime highs of 9°C and overnight lows near 3°C, with 95 mm of precipitation across 11.4 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 7°C in the first days to 11°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 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Grimsby's 7th-clearest and 7th-windiest month. For the whole year in context, see Grimsby's year-round climate.

Daytime high
7th warmest
Overnight low
5th coldest
Precipitation
95 mm
11.4 wet days
Daylight
13 h 12 min
5:43 AM – 6:54 PM
Cloud cover
65%
7th clearest
Wind
15 km/h
7th windiest
Solar energy
4.88 kWh/m²
Travel score
1.7
out of 10

Grimsby is town in Niagara Region, Ontario, Canada.

Density
398/km²
people per km²
Founded
1790

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 7°C in the first days to 11°C by the end.

A typical April day in Grimsby reaches about 9°C in the afternoon and slips back to 3°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 14°C. Set against its neighbours, April runs about 6°C warmer than March and about 6°C cooler than May.

-5°10°15°20°151015202530
Avg high (°C)Avg low (°C)
161
271
371
471
572
672
772
882
982
1082
1183
1283
1393
1493
1593
1694
1794
18104
19104
20104
21104
22105
23105
24115
25115
26115
27116
28116
29116
30126

How April really feels in Grimsby

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 16 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
16
wind chill below the day's low

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

Grimsby weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -5°7311.58.59.20.0
Feb-0° / -6°588.66.610.20.0
Mar / -2°719.94.511.60.1
Apr / 9511.41.813.11.7
May15° / 8010.8014.44.4
Jun21° / 16°8210.8015.16.4
Jul25° / 19°749.7014.97.0
Aug24° / 19°679.7013.87.1
Sep21° / 16°789.3012.36.6
Oct14° / 8811.3010.84.1
Nov / 8110.61.99.51.4
Dec / -1°7511.15.88.90.0

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 13% of April, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23565
33565
43466
53466
63466
73466
83565
93565
103466
113565
123664
133664
143664
153763
163763
173763
183763
193763
203862
213862
223961
233862
243862
253862
263961
274060
284060
294159
304159

Chance of precipitation in April

Any precipitationSnow

Grimsby gets around 95 mm of rain and snow over 11.4 wet days in April, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 37% and peaks near 38% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
13611
23611
33711
43711
53711
63811
73810
83810
9389
10379
11378
12378
13377
14376
15375
16375
17374
18384
19383
20383
21382
22382
23382
24381
25381
26381
27381
28380
29370
30370

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
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
28991
29991
30991

Wind in April

Winds average 15 km/h in April.

Across April, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 6:10 AM to 5:21 AM, and sunset from 6:36 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:106:36
212.56:086:37
312.56:066:39
412.66:046:40
512.66:026:41
612.76:016:42
712.75:596:43
812.85:576:44
912.85:556:46
1012.95:536:47
1112.95:526:48
1213.05:506:49
1313.05:486:50
1413.15:466:52
1513.15:456:53
1613.25:436:54
1713.25:416:55
1813.35:406:56
1913.35:386:58
2013.45:366:59
2113.45:357:00
2213.55:337:01
2313.55:317:02
2413.65:307:03
2513.65:287:05
2613.75:277:06
2713.75:257:07
2813.75:247:08
2913.85:227:09
3013.85:217:11

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.88 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.29 kWh/m² in June across the year — April's 4.88 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.5Bright
74.6Bright
84.6Bright
94.6Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.8Bright
154.9Bright
164.9Bright
174.9Bright
185.0Bright
195.0Bright
205.0Bright
215.1Bright
225.1Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in April

Is April a good time to visit Grimsby?

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

1.7
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 Grimsby.

What to pack for Grimsby in April

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

In April, Grimsby sees daytime highs around 9°C and nights near 3°C. Pack a warm layer. Worth having: rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Grimsby in April

The nearest coast averages about 4°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 20 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 22 to Sep 1 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May8Bracing
Jun15Cool
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Grimsby 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 Grimsby peaks around June 20 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Grimsby in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Grimsby is worst in May — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMay 2021 µg/m³Dec 1010 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar18Moderate
Apr18Moderate
May22Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep17Moderate
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Grimsby?

Grimsby sits at 43.2°N, 79.6°W, 88 m above sea level, in Canada. The nearest listed city is Stoney Creek, 16 km away.

Topography around Grimsby

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

Within 3 km, the terrain around Grimsby has only modest variations in elevation — a maximum elevation change of 145 m around an average of 110 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 155 m; within 80 km, significant variations in elevation — a maximum elevation change of 401 m.

The land around Grimsby is covered by water (41%) and trees (23%) within 3 km, water (45%) and cropland (23%) within 16 km, and water (38%), trees (21%) and cropland (21%) within 80 km.

3 km
145 m
16 km
155 m
80 km
401 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Stoney Creek 16 km · Hamilton 24 km · St. Catharines 26 km · Oakville 29 km · Waterdown 30 km · Burlington 30 km · Thorold 31 km · Ancaster 34 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 Grimsby (43.2001°, -79.5663°, elevation 88 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).