Grimsby weather in August

In August, Grimsby sees average daytime highs of 20°C and overnight lows near 13°C, with 66 mm of rain across 11.7 wet days and about 14.6 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 19°C by the end. The sky is clear or mostly clear about 12% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 30 min at the start of August to 13 h 36 min by month's end. Set against the rest of the year, August is Grimsby's 2nd-clearest and 10th-windiest month. For the whole year in context, see Grimsby's year-round climate.

Daytime high
20°
1st warmest
Overnight low
13°
12th coldest
Rainfall
66 mm
11.7 wet days
Daylight
14 h 36 min
4:46 AM – 7:22 PM
Cloud cover
69%
2nd clearest
Wind
16 km/h
10th windiest
Solar energy
4.26 kWh/m²
Travel score
5.9
out of 10

Grimsby is seaport town in Lincolnshire, England, United Kingdom.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 19°C by the end.

A typical August day in Grimsby reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12114
22114
32114
42114
52114
62114
72114
82113
92113
102113
112113
122113
132113
142113
152113
162113
172013
182013
192013
202013
212013
222013
232013
242013
252012
262012
272012
281912
291912
301912
311912

How August really feels in Grimsby

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Grimsby weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 4911.20.97.80.8
Feb / 409.71.19.41.1
Mar10° / 4311.10.611.51.9
Apr12° / 4811.20.113.73.0
May15° / 5210.9015.64.3
Jun18° / 11°6511.9016.75.3
Jul20° / 13°7012.8016.35.8
Aug20° / 13°6611.7014.65.9
Sep18° / 11°569.8012.55.5
Oct14° / 5910.8010.33.8
Nov10° / 55120.28.32.1
Dec / 5211.217.31.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33367
43466
53466
63466
73466
83565
93466
103565
113565
123565
133565
143664
153664
163565
173565
183565
193565
203565
213565
223565
233466
243466
253367
263367
273268
283268
293268
303268
313169

Chance of precipitation in August

Any precipitation

Grimsby gets around 66 mm of rain over 11.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
538
638
738
838
938
1038
1138
1238
1339
1439
1539
1639
1740
1840
1940
2039
2139
2239
2339
2438
2538
2637
2737
2836
2936
3035
3135

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1523414
2523414
3523414
4523414
5533314
6543313
7543313
8553213
9553213
10553213
11563113
12573112
13573112
14573112
15573112
16593011
17593011
18603010
19603010
2062299
2162299
2264288
2365278
2466277
2567267
2668266
2768266
2869265
2969265
3071254
3171254

Wind in August

Winds average 16 km/h in August.

Across August, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3017light breeze
3117light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 30 min at the start of August to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 114 minutes over August. Sunrise moves from 4:20 AM to 5:13 AM, and sunset from 7:52 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.54:207:52
215.54:227:51
315.44:247:49
415.44:257:47
515.34:277:45
615.24:297:43
715.24:317:41
815.14:327:39
915.14:347:37
1015.04:367:35
1114.94:377:33
1214.94:397:31
1314.84:417:29
1414.74:437:27
1514.74:457:25
1614.64:467:22
1714.54:487:20
1814.54:507:18
1914.44:527:16
2014.34:537:14
2114.34:557:11
2214.24:577:09
2314.14:597:07
2414.15:017:04
2514.05:027:02
2613.95:047:00
2713.95:066:57
2813.85:086:55
2913.75:106:52
3013.65:116:50
3113.65:136:47

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.26 kWh/m².

For context, solar energy here swings from a low near 0.56 kWh/m² to a high of 5.23 kWh/m² in June across the year — August's 4.26 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Grimsby?

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

5.9
Sightseeing
1st-best month of the year
3.3
Beach & pool
1st-best month of the year

August is a reasonable time to visit Grimsby for sightseeing.

What to pack for Grimsby in August

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

In August, Grimsby sees daytime highs around 20°C and nights near 13°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Grimsby in August

The nearest coast averages about 15°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in August at about 15°C and coldest in February near 6°C.

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

5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr8Bracing
May9Bracing
Jun12Bracing
Jul14Bracing
Aug15Bracing
Sep14Bracing
Oct13Bracing
Nov10Bracing
Dec8Bracing

UV index in Grimsby in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Grimsby peaks around August 12 at about 6 (high) — a little sun protection helps at midday. 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low
Location & terrain

Where is Grimsby?

Grimsby sits at 53.6°N, 0.1°W, 4 m above sea level, in United Kingdom. The nearest listed city is Cleethorpes, 3.0 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 27 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 157 m; within 80 km, significant variations in elevation — a maximum elevation change of 268 m.

The land around Grimsby is covered by artificial surfaces (45%) and water (23%) within 3 km, cropland (47%) and water (29%) within 16 km, and cropland (49%) and water (28%) within 80 km.

3 km
27 m
16 km
157 m
80 km
268 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Cleethorpes 3.0 km · Louth 23 km · Kingston upon Hull 26 km · Brough 37 km · Scunthorpe 38 km · Beverley 39 km · Lincoln 49 km · Gainsborough 50 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 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 (53.5654°, -0.0755°, elevation 4 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).