Climate averages 1991–2020

Grimsby weather
in July.

A mild, moderately wet month: one of the warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 19.9°C Daytime mean, July

Average low 12.9°C Night-time mean, July

Rainfall 70 mm 13 days with ≥1 mm

Daylight 16 h Sunrise to sunset, per day

July is a mild month in Grimsby: daytime highs average 19.9°C and nights cool to about 12.9°C. By daytime temperature it is one of the warmest months of the year.

Expect about 70 mm of rain on roughly 13 days, which makes July a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 16 h 29 min on an average July day.

The nearest other city in this atlas is Kingston upon Hull (26 km away). In July its highs average 19.7°C, about as warm as Grimsby, with 66 mm of rain.

Among the 143 cities listed in the United Kingdom, Grimsby ranks joint 81st of 143 for the warmest July highs and joint 103rd of 143 for the driest July (rainfall, lowest first). The mean July high of those 143 cities is 20.0°C; Grimsby is level with that mean.

From July to August, average highs stay level at 19.9°C, and monthly rainfall falls from 70 mm to 66 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Grimsby climate table

1991–2020

Monthly climate averages for Grimsby, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	6.9°C2.4°C	2.4°C	49	11.2	8.18 h
February	7.5°C2.2°C	2.2°C	40	9.8	9.810 h
March	9.5°C3.3°C	3.3°C	43	11.1	11.812 h
April	11.8°C5.0°C	5.0°C	48	11.2	14.014 h
May	14.6°C7.8°C	7.8°C	52	10.9	15.916 h
June	17.5°C10.7°C	10.7°C	65	11.8	16.917 h
July, selected	19.9°C12.9°C	12.9°C	70	12.7	16.516 h
August	19.9°C13.0°C	13.0°C	66	11.7	14.815 h
September	17.4°C11.1°C	11.1°C	56	9.7	12.813 h
October	13.8°C8.4°C	8.4°C	59	10.7	10.611 h
November	9.8°C5.1°C	5.1°C	55	11.9	8.79 h
December	7.1°C2.8°C	2.8°C	52	11.2	7.68 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Grimsby

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Grimsby) is explained once on the Grimsby year overview and on the Sources, method and limits page.