August is one of the warmer months of the year in Grimsby, with average highs near 19.2°C and lows around 13°C (mean 16.1°C). It is a relatively wet time of year, averaging 59 mm of rainfall and 83% relative humidity across the period.
August is one of the warmer months of the year in Grimsby. Across 45 years of records, the warmest August in Grimsby was 2022 — when the month averaged 18.1°C — while the coldest was 1986 at 13.5°C. Typical August days reach 19.2°C with nights near 13°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Grimsby, averaging 59 mm of rainfall. The wettest August on record was 2004 with 122 mm, while the driest was 1995 at 11 mm.
Relative humidity in Grimsby during August averages 83%. The most humid August was 2002 at 86%, and the least humid was 1992 at 78%.
August receives about 4 kWh/m²/day of solar energy in Grimsby. The sunniest August was 2022 at 4.8 kWh/m²/day, and the cloudiest was 2008 at 3.4.
Average wind speed in Grimsby during August is 3.7 m/s. The windiest August was 1992 at 4.8 m/s, while the calmest was 2002 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.3°C | 16.2°C | 16.3°C | 16.1°C | 17.0°C | +1.7°C |
| Avg High | 18.3°C | 19.3°C | 19.3°C | 19.1°C | 20.0°C | +1.7°C |
| Avg Low | 12.3°C | 13.0°C | 13.3°C | 13.0°C | 13.9°C | +1.6°C |
| Avg Rain | — | 53 mm | 71 mm | 61 mm | 41 mm | — |
August temperatures in Grimsby have risen by about 1.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 8.3°C (2014) to a record high of 26.2°C (2020).
Rainfall in August is a relatively wet time of year, averaging 59 mm, with a wettest year of 122 mm.
One of the best times to visit Grimsby
August is one of the best times to visit Grimsby. Expect days averaging 19.2°C and nights around 13°C (mean 16.1°C) — warmer than Grimsby's yearly average — with moderate rainfall (59 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.4°C | 17.1°C | 13.8°C | 24.6°C | 11.7°C | 18 mm | 79% | 3.8 m/s | 4.1 |
| 2024 | 20.2°C | 16.9°C | 13.6°C | 24.7°C | 11.0°C | 22 mm | 81% | 4.1 m/s | 4 |
| 2023 | 19.6°C | 16.5°C | 13.4°C | 23.8°C | 11.0°C | 60 mm | 82% | 3.7 m/s | 3.8 |
| 2022 🔥 | 21.3°C | 18.1°C | 14.8°C | 24.5°C | 10.9°C | 36 mm | 81% | 3 m/s | 4.8 |
| 2021 | 18.9°C | 16.1°C | 13.4°C | 20.9°C | 11.4°C | 31 mm | 83% | 3.7 m/s | 3.7 |
| 2020 | 19.7°C | 17.0°C | 14.4°C | 26.2°C | 9.3°C | 82 mm | 84% | 4.5 m/s | 3.7 |
| 2019 | 20.5°C | 17.1°C | 13.7°C | 25.3°C | 11.0°C | 56 mm | 81% | 4.4 m/s | 4.2 |
| 2018 | 20.0°C | 16.9°C | 13.7°C | 24.2°C | 10.0°C | 53 mm | 81% | 3.3 m/s | 3.9 |
| 2017 | 18.5°C | 15.5°C | 12.5°C | 22.1°C | 10.0°C | 79 mm | 82% | 3.7 m/s | 4.2 |
| 2016 | 19.4°C | 16.4°C | 13.5°C | 23.2°C | 10.5°C | 52 mm | 83% | 4 m/s | 4.3 |
| 2015 | 19.1°C | 15.9°C | 12.8°C | 23.0°C | 10.2°C | 66 mm | 82% | 3.8 m/s | 3.9 |
| 2014 | 18.0°C | 15.1°C | 12.2°C | 21.2°C | 8.3°C | 75 mm | 81% | 4.5 m/s | 3.9 |
| 2013 | 19.6°C | 16.4°C | 13.3°C | 24.7°C | 10.5°C | 43 mm | 82% | 3.5 m/s | 4.2 |
| 2012 | 19.3°C | 16.4°C | 13.4°C | 23.8°C | 9.5°C | 60 mm | 84% | 3.5 m/s | 3.7 |
| 2011 | 18.7°C | 15.5°C | 12.3°C | 23.8°C | 9.9°C | 50 mm | 81% | 3.6 m/s | 3.7 |
| 2010 | 18.1°C | 15.3°C | 12.4°C | 22.1°C | 9.8°C | 78 mm | 83% | 4.2 m/s | 3.9 |
| 2009 | 19.9°C | 16.7°C | 13.5°C | 22.8°C | 10.2°C | 49 mm | 83% | 3.9 m/s | 3.9 |
| 2008 | 19.2°C | 16.3°C | 13.5°C | 21.8°C | 10.2°C | 109 mm | 85% | 4.1 m/s | 3.4 |
| 2007 | 18.6°C | 15.6°C | 12.5°C | 23.4°C | 10.4°C | 37 mm | 83% | 3.9 m/s | 4.3 |
| 2006 | 18.6°C | 15.9°C | 13.2°C | 24.0°C | 11.0°C | 109 mm | 84% | 3.9 m/s | 3.6 |
| 2005 | 18.8°C | 15.6°C | 12.4°C | 23.7°C | 10.3°C | 63 mm | 83% | 3.6 m/s | 4.1 |
| 2004 🌧️ | 19.6°C | 16.8°C | 14.0°C | 24.0°C | 10.2°C | 122 mm | 86% | 3.5 m/s | 3.7 |
| 2003 | 19.9°C | 16.8°C | 13.8°C | 25.9°C | 10.0°C | 17 mm | 83% | 3.1 m/s | 4.2 |
| 2002 | 19.9°C | 16.9°C | 14.0°C | 24.2°C | 11.8°C | 82 mm | 86% | 2.8 m/s | 3.7 |
| 2001 | 19.4°C | 16.3°C | 13.3°C | 24.9°C | 10.0°C | 77 mm | 84% | 3.1 m/s | 3.8 |
| 2000 | 19.1°C | 16.0°C | 13.0°C | 22.1°C | 10.0°C | 48 mm | 85% | 3.1 m/s | 4.2 |
| 1999 | 18.4°C | 15.7°C | 13.0°C | 23.8°C | 9.5°C | 92 mm | 83% | 3.5 m/s | 3.8 |
| 1998 | 18.5°C | 15.3°C | 12.1°C | 23.1°C | 9.9°C | 42 mm | 82% | 4.1 m/s | 4.2 |
| 1997 | 21.0°C | 17.9°C | 14.8°C | 25.2°C | 11.7°C | 71 mm | 85% | 3.1 m/s | 4.1 |
| 1996 | 19.0°C | 16.0°C | 12.9°C | 24.4°C | 10.4°C | 77 mm | 83% | 3.6 m/s | 4 |
| 1995 | 20.1°C | 17.2°C | 14.2°C | 24.1°C | 11.2°C | 11 mm | 82% | 3.4 m/s | 4.7 |
| 1994 | 18.4°C | 15.5°C | 12.7°C | 23.0°C | 9.8°C | 40 mm | 82% | 4 m/s | 4.1 |
| 1993 | 17.4°C | 14.3°C | 11.3°C | 20.9°C | 8.6°C | 52 mm | 81% | 3.8 m/s | 4 |
| 1992 | 18.9°C | 15.6°C | 12.3°C | 22.7°C | 9.2°C | 76 mm | 78% | 4.8 m/s | 4 |
| 1991 | 20.2°C | 16.7°C | 13.2°C | 22.7°C | 9.8°C | 16 mm | 80% | 3.1 m/s | 4.2 |
| 1990 | 21.0°C | 17.3°C | 13.6°C | — | — | — | — | — | — |
| 1989 | 19.5°C | 16.2°C | 12.9°C | — | — | — | — | — | — |
| 1988 | 18.0°C | 15.0°C | 12.0°C | — | — | — | — | — | — |
| 1987 | 17.7°C | 15.0°C | 12.3°C | — | — | — | — | — | — |
| 1986 ❄️ | 16.2°C | 13.5°C | 10.7°C | — | — | — | — | — | — |
| 1985 | 17.5°C | 14.4°C | 11.3°C | — | — | — | — | — | — |
| 1984 | 19.5°C | 16.3°C | 13.1°C | — | — | — | — | — | — |
| 1983 | 19.2°C | 16.1°C | 13.1°C | — | — | — | — | — | — |
| 1982 | 18.4°C | 15.3°C | 12.2°C | — | — | — | — | — | — |
| 1981 | 18.9°C | 15.8°C | 12.7°C | — | — | — | — | — | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 19.2°C with lows near 13°C (mean 16.1°C), based on 45 years of NASA POWER data.
August averages 59 mm of rainfall in Grimsby, a relatively wet time of year. The wettest on record was 122 mm in 2004.
The hottest August reached 26.2°C in 2020. The coldest dipped to 8.3°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.3°C. Daytime highs moved from 18.7°C to 20.1°C and overnight lows from 12.5°C to 13.8°C over the same span.
August is one of the warmer months of the year in Grimsby and a relatively wet time of year, so plan for around 19.2°C daytime highs and 13°C at night.
Not quite — August is the 12th coolest month in Grimsby, averaging 16.1°C.
For August in Grimsby, pack light layers you can adjust through the day, with typical highs of 19.2°C and lows of 13°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 83% — quite humid.
Average wind speed in August is 3.7 m/s. The windiest August on record averaged 4.8 m/s (1992).
The wettest August on record was 2004 with 122 mm. On average, August sees 59 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Grimsby behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
