July is one of the warmer months of the year in Sleaford, with average highs near 21.2°C and lows around 11.7°C (mean 16.5°C). It is about average for rainfall, averaging 62 mm of rainfall and 79% relative humidity across the period.
July is one of the warmer months of the year in Sleaford. Across 45 years of records, the warmest July in Sleaford was 2006 — when the month averaged 18.9°C — while the coldest were 1988 and 2000 at 14.7°C. Typical July days reach 21.2°C with nights near 11.7°C. The long-term trend is warming, about 0.2°C per decade.
July is about average for rainfall in Sleaford, averaging 62 mm of rainfall. The wettest July on record was 2007 with 110 mm, while the driest was 1984 at 24 mm.
Relative humidity in Sleaford during July averages 79%. The most humid July was 2007 at 83%, and the least humid was 1990 at 74%.
July receives about 5 kWh/m²/day of solar energy in Sleaford. The sunniest July was 2006 at 6 kWh/m²/day, and the cloudiest was 1987 at 4.3.
Average wind speed in Sleaford during July is 2.9 m/s. The windiest July was 1988 at 3.9 m/s, while the calmest was 1983 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.0°C | 16.5°C | 16.2°C | 16.7°C | 17.0°C | +1°C |
| Avg High | 20.7°C | 21.4°C | 20.7°C | 21.5°C | 21.6°C | +0.9°C |
| Avg Low | 11.3°C | 11.6°C | 11.7°C | 11.9°C | 12.2°C | +0.9°C |
| Avg Rain | 50 mm | 50 mm | 80 mm | 61 mm | 68 mm | +19 mm |
July temperatures in Sleaford have risen by about 1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.7°C (1984) to a record high of 33°C (2022).
Rainfall in July is about average for rainfall, averaging 62 mm, with a wettest year of 110 mm.
One of the best times to visit Sleaford
July is one of the best times to visit Sleaford. Expect days averaging 21.2°C and nights around 11.7°C (mean 16.5°C) — warmer than Sleaford's yearly average — with moderate rainfall (62 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 | 22.6°C | 17.8°C | 13.0°C | 28.8°C | 9.1°C | 69 mm | 78% | 2.7 m/s | 5 |
| 2024 | 21.1°C | 16.4°C | 11.7°C | 27.9°C | 8.1°C | 82 mm | 80% | 2.7 m/s | 4.9 |
| 2023 | 20.6°C | 16.3°C | 11.9°C | 25.7°C | 9.3°C | 92 mm | 78% | 3.5 m/s | 4.4 |
| 2022 | 23.1°C | 18.0°C | 12.8°C | 33.0°C | 8.9°C | 26 mm | 75% | 2.7 m/s | 5.2 |
| 2021 | 22.3°C | 17.7°C | 13.0°C | 28.0°C | 9.3°C | 66 mm | 81% | 2.2 m/s | 5.1 |
| 2020 | 20.0°C | 15.5°C | 11.0°C | 29.4°C | 6.7°C | 75 mm | 80% | 3.3 m/s | 4.8 |
| 2019 | 22.3°C | 17.6°C | 12.8°C | 32.2°C | 8.9°C | 87 mm | 79% | 2.7 m/s | 4.9 |
| 2018 | 23.9°C | 18.5°C | 13.2°C | 29.1°C | 8.9°C | 26 mm | 77% | 2.2 m/s | 5.9 |
| 2017 | 21.0°C | 16.4°C | 11.8°C | 25.8°C | 9.9°C | 84 mm | 80% | 3.1 m/s | 5 |
| 2016 | 21.2°C | 16.6°C | 11.9°C | 28.6°C | 8.0°C | 38 mm | 79% | 3 m/s | 5.1 |
| 2015 | 20.6°C | 15.8°C | 10.9°C | 29.6°C | 6.1°C | 76 mm | 77% | 3.1 m/s | 5 |
| 2014 | 22.4°C | 17.4°C | 12.4°C | 27.0°C | 7.9°C | 46 mm | 79% | 2.7 m/s | 5.6 |
| 2013 | 22.9°C | 17.7°C | 12.5°C | 27.1°C | 7.7°C | 55 mm | 79% | 2.3 m/s | 5.7 |
| 2012 | 19.8°C | 15.3°C | 10.8°C | 26.1°C | 7.7°C | 109 mm | 81% | 2.7 m/s | 4.6 |
| 2011 | 19.7°C | 15.0°C | 10.2°C | 23.6°C | 7.2°C | 48 mm | 77% | 2.7 m/s | 4.6 |
| 2010 | 21.3°C | 16.9°C | 12.5°C | 25.4°C | 8.8°C | 38 mm | 79% | 3.1 m/s | 4.9 |
| 2009 | 20.3°C | 15.9°C | 11.5°C | 26.5°C | 8.2°C | 101 mm | 81% | 3.3 m/s | 5 |
| 2008 | 21.0°C | 16.2°C | 11.5°C | 26.3°C | 8.0°C | 71 mm | 80% | 3.2 m/s | 5.1 |
| 2007 🌧️ | 19.0°C | 15.1°C | 11.2°C | 21.8°C | 8.1°C | 110 mm | 83% | 3.4 m/s | 4.4 |
| 2006 🔥 | 24.2°C | 18.9°C | 13.6°C | 27.9°C | 8.4°C | 49 mm | 77% | 2.4 m/s | 6 |
| 2005 | 20.6°C | 16.2°C | 11.7°C | 25.8°C | 9.6°C | 76 mm | 81% | 2.9 m/s | 4.5 |
| 2004 | 20.0°C | 15.6°C | 11.1°C | 25.0°C | 7.8°C | 79 mm | 81% | 2.8 m/s | 4.6 |
| 2003 | 21.4°C | 17.0°C | 12.6°C | 26.4°C | 9.7°C | 80 mm | 82% | 2.9 m/s | 4.8 |
| 2002 | 20.3°C | 15.8°C | 11.3°C | 27.1°C | 8.2°C | 107 mm | 82% | 2.5 m/s | 4.6 |
| 2001 | 21.2°C | 16.6°C | 12.0°C | 26.5°C | 6.5°C | 78 mm | 80% | 2.9 m/s | 4.7 |
| 2000 | 19.0°C | 14.7°C | 10.4°C | 22.5°C | 7.3°C | 54 mm | 82% | 2.6 m/s | 4.6 |
| 1999 | 21.9°C | 16.7°C | 11.6°C | 26.2°C | 8.1°C | 33 mm | 80% | 2.9 m/s | 5.7 |
| 1998 | 19.5°C | 15.1°C | 10.7°C | 23.8°C | 8.3°C | 36 mm | 80% | 3.5 m/s | 4.6 |
| 1997 | 21.0°C | 16.2°C | 11.4°C | 24.7°C | 8.9°C | 60 mm | 80% | 2.6 m/s | 5.1 |
| 1996 | 21.3°C | 16.0°C | 10.8°C | 28.4°C | 5.7°C | 38 mm | 77% | 2.8 m/s | 5.3 |
| 1995 | 22.7°C | 17.7°C | 12.7°C | 27.9°C | 8.2°C | 30 mm | 79% | 2.8 m/s | 5.5 |
| 1994 | 22.8°C | 17.6°C | 12.4°C | 27.9°C | 8.6°C | 54 mm | 79% | 2.4 m/s | 5.6 |
| 1993 | 19.5°C | 15.0°C | 10.5°C | 23.8°C | 6.5°C | 71 mm | 78% | 3.4 m/s | 5 |
| 1992 | 21.0°C | 16.4°C | 11.8°C | 25.8°C | 9.0°C | 101 mm | 76% | 3 m/s | 4.5 |
| 1991 | 22.8°C | 17.7°C | 12.7°C | 26.6°C | 9.6°C | 45 mm | 77% | 3.1 m/s | 5 |
| 1990 | 21.8°C | 16.4°C | 11.0°C | 27.6°C | 7.0°C | 30 mm | 74% | 3.2 m/s | 5.5 |
| 1989 | 22.2°C | 17.2°C | 12.2°C | 28.0°C | 8.5°C | 48 mm | 79% | 2.7 m/s | 5.3 |
| 1988 ❄️ | 18.8°C | 14.7°C | 10.7°C | 23.8°C | 7.5°C | 100 mm | 82% | 3.9 m/s | 4.4 |
| 1987 | 19.9°C | 15.7°C | 11.5°C | 26.2°C | 7.8°C | 56 mm | 80% | 3.1 m/s | 4.3 |
| 1986 | 20.1°C | 15.5°C | 10.8°C | 26.1°C | 7.7°C | 43 mm | 79% | 3.1 m/s | 4.4 |
| 1985 | 20.4°C | 15.8°C | 11.1°C | 24.3°C | 7.9°C | 58 mm | 80% | 3.2 m/s | 4.8 |
| 1984 | 20.8°C | 15.7°C | 10.5°C | 25.8°C | 5.7°C | 24 mm | 79% | 2.6 m/s | 5.2 |
| 1983 | 23.6°C | 18.3°C | 12.9°C | 27.7°C | 7.2°C | 56 mm | 81% | 2 m/s | — |
| 1982 | 20.8°C | 15.9°C | 11.0°C | 26.4°C | 7.3°C | 28 mm | 81% | 2.7 m/s | — |
| 1981 | 19.6°C | 15.1°C | 10.7°C | 23.6°C | 8.2°C | 35 mm | 82% | 2.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 21.2°C with lows near 11.7°C (mean 16.5°C), based on 45 years of NASA POWER data.
July averages 62 mm of rainfall in Sleaford, about average for rainfall. The wettest on record was 110 mm in 2007.
The hottest July reached 33°C in 2022. The coldest dipped to 5.7°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1°C. Daytime highs moved from 21°C to 21.9°C and overnight lows from 11.2°C to 12.5°C over the same span.
July is one of the warmer months of the year in Sleaford and about average for rainfall, so plan for around 21.2°C daytime highs and 11.7°C at night.
Not quite — July is the 12th coolest month in Sleaford, averaging 16.5°C.
For July in Sleaford, pack light layers you can adjust through the day, with typical highs of 21.2°C and lows of 11.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 79% — quite humid.
Average wind speed in July is 2.9 m/s. The windiest July on record averaged 3.9 m/s (1988).
The wettest July on record was 2007 with 110 mm. On average, July sees 62 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 Sleaford behaves each July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
