Grimsby weather forecast
UK towns · Lincolnshire, England · 53.57°N 0.08°W
Grimsby, in Lincolnshire, England, has its warmest weather in August, when daytime temperatures average 20.7°C, while January nights are the coldest at around 2.8°C. The town sees roughly 781mm of rain a year; October is normally the wettest month and April the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | 7.6° | 2.8° | 49mm | 10 |
| Feb | 9.5° | 4.1° | 69mm | 12 |
| Mar | 10.2° | 4.3° | 52mm | 12 |
| Apr | 11.4° | 5.1° | 47mm | 11 |
| May | 15.2° | 8.6° | 61mm | 12 |
| Jun | 18° | 11.5° | 60mm | 10 |
| Jul | 20.1° | 13.4° | 83mm | 14 |
| Aug | 20.7° | 13.8° | 63mm | 13 |
| Sep | 18.3° | 12.1° | 73mm | 14 |
| Oct | 14.9° | 9.4° | 88mm | 14 |
| Nov | 10.7° | 5.9° | 55mm | 10 |
| Dec | 8.2° | 4.1° | 81mm | 14 |
Seasons in Grimsby
Spring (March–May). Daytime highs in Grimsby climb from 10.2°C in March to 15.2°C by May, while nights ease from 4.3°C to 8.6°C. The season brings around 160mm of rain in total.
Summer (June–August). The warmest stretch of the year: afternoons average 19.6°C, peaking in August at 20.7°C. June is usually the driest of the summer months (60mm over ~10 rainy days). Around the June solstice, Grimsby gets roughly 16.8 hours of daylight.
Autumn (September–November). Daytime temperatures fall from 18.3°C in September to 10.7°C by November, and rainfall builds to its annual peak — October is the wettest month of the year (88mm).
Winter (December–February). Nights average 3.7°C, with January the coldest month (average low 2.8°C, daytime high 7.6°C). Expect about 36 days with measurable rain over the three months, and only around 7.2 hours of daylight in mid-December.
How Grimsby compares
| Grimsby | UK town average | |
|---|---|---|
| Annual rainfall | 781mm | 1054mm |
| Rainy days per year | 146 | 167 |
| Summer daytime high | 19.6°C | 19.7°C |
| Winter night low | 3.7°C | 3.4°C |
Grimsby is about 26% drier than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Grimsby weather FAQs
What is the warmest month in Grimsby?
August is typically the warmest month in Grimsby, with average daytime highs of 20.7°C. Summer afternoons (June–August) average around 19.6°C.
What is the wettest month in Grimsby?
October is usually the wettest month, with around 88mm of rain over roughly 14 rainy days. April is typically the driest (47mm).
How much does it rain in Grimsby per year?
Grimsby receives roughly 781mm of precipitation per year, spread over about 146 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Grimsby?
Winter nights (December–February) in Grimsby average around 3.7°C, with January typically the coldest month (average low 2.8°C).
When is the best time to visit Grimsby for good weather?
Late spring and summer offer the most reliable weather in Grimsby. June is typically the driest of the warm months (60mm of rain), while August is the warmest, averaging 20.7°C by day — and near the June solstice there are around 17 hours of daylight to enjoy.
How does Grimsby's weather compare with the rest of the UK?
Grimsby receives 781mm of rain a year, about 26% drier than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 19.6°C against a UK-town average of 19.7°C, and winter nights average 3.7°C versus 3.4°C.
Is it going to rain in Grimsby?
For up-to-the-minute rain tracking, check the live rain radar — as a long-term guide, Grimsby averages 146 rainy days a year, with October the wettest month (88mm) and April the driest (47mm).
What is the 7-day forecast for Grimsby?
See the live hourly and 7-day forecast for day-by-day temperatures and rain chance. The figures on this page are long-term climate averages from 2020–2024, not the live forecast.