July is one of the warmer months of the year in Lancaster, with average highs near 29.9°C and lows around 18.6°C (mean 24.3°C). It is a relatively wet time of year, averaging 116 mm of rainfall and 70% relative humidity across the period.
July is one of the warmer months of the year in Lancaster. Across 45 years of records, the warmest July in Lancaster was 1999 — when the month averaged 27°C — while the coldest was 1984 at 21°C. Typical July days reach 29.9°C with nights near 18.6°C. The long-term trend is warming, about 0.5°C per decade.
July is a relatively wet time of year in Lancaster, averaging 116 mm of rainfall. The wettest July on record was 2018 with 220 mm, while the driest was 1983 at 29 mm.
Relative humidity in Lancaster during July averages 70%. The most humid July was 1989 at 83%, and the least humid was 1999 at 53%.
July receives about 5.9 kWh/m²/day of solar energy in Lancaster. The sunniest July was 2011 at 6.6 kWh/m²/day, and the cloudiest were 1984 and 2004 at 5.1.
Average wind speed in Lancaster during July is 0.9 m/s. The windiest Julys were 2002, 2003 and 2007, among others at 1 m/s, while the calmest were 2020, 2023 and 2025, among others at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.6°C | 24.1°C | 23.5°C | 24.9°C | 25.8°C | +2.2°C |
| Avg High | 29.3°C | 29.9°C | 29.0°C | 30.3°C | 31.4°C | +2.1°C |
| Avg Low | 17.9°C | 18.4°C | 18.0°C | 19.4°C | 20.2°C | +2.3°C |
| Avg Rain | 115 mm | 104 mm | 107 mm | 132 mm | 128 mm | +12 mm |
July temperatures in Lancaster have risen by about 2.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.1°C (1988) to a record high of 39.2°C (2010).
Rainfall in July is a relatively wet time of year, averaging 116 mm, with a wettest year of 220 mm.
One of the best times to visit Lancaster
July is one of the best times to visit Lancaster. Expect days averaging 29.9°C and nights around 18.6°C (mean 24.3°C) — warmer than Lancaster's yearly average — with higher rainfall (116 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 | 31.2°C | 25.8°C | 20.5°C | 37.4°C | 16.2°C | 155 mm | 74% | 0.8 m/s | 5.9 |
| 2024 | 32.0°C | 26.4°C | 20.7°C | 37.4°C | 14.6°C | 92 mm | 67% | 0.9 m/s | 6 |
| 2023 | 30.5°C | 25.2°C | 19.8°C | 34.8°C | 16.9°C | 158 mm | 74% | 0.8 m/s | 5.9 |
| 2022 | 31.7°C | 25.8°C | 19.9°C | 36.7°C | 15.3°C | 97 mm | 67% | 0.9 m/s | 5.9 |
| 2021 | 30.6°C | 25.0°C | 19.3°C | 34.8°C | 13.6°C | 123 mm | 70% | 0.9 m/s | 5.7 |
| 2020 | 32.3°C | 26.5°C | 20.7°C | 35.9°C | 17.9°C | 140 mm | 68% | 0.8 m/s | 6.3 |
| 2019 | 30.1°C | 24.9°C | 19.7°C | 33.9°C | 14.4°C | 142 mm | 76% | 0.8 m/s | 6.3 |
| 2018 🌧️ | 28.9°C | 23.8°C | 18.6°C | 34.6°C | 13.1°C | 220 mm | 75% | 0.9 m/s | 6 |
| 2017 | 30.0°C | 24.6°C | 19.2°C | 34.5°C | 13.3°C | 176 mm | 73% | 0.9 m/s | 5.6 |
| 2016 | 31.8°C | 25.8°C | 19.9°C | 36.2°C | 14.1°C | 135 mm | 66% | 0.9 m/s | 6.2 |
| 2015 | 28.8°C | 23.6°C | 18.3°C | 33.1°C | 13.1°C | 98 mm | 75% | 0.8 m/s | 6 |
| 2014 | 28.0°C | 22.7°C | 17.5°C | 31.8°C | 12.3°C | 126 mm | 76% | 0.9 m/s | 6 |
| 2013 | 29.1°C | 24.6°C | 20.1°C | 35.3°C | 13.4°C | 122 mm | 79% | 0.9 m/s | 5.8 |
| 2012 | 32.5°C | 26.6°C | 20.7°C | 38.9°C | 16.6°C | 98 mm | 63% | 0.9 m/s | 6 |
| 2011 | 31.9°C | 26.1°C | 20.3°C | 37.4°C | 14.3°C | 67 mm | 67% | 0.8 m/s | 6.6 |
| 2010 | 31.8°C | 25.8°C | 19.7°C | 39.2°C | 12.5°C | 141 mm | 64% | 0.9 m/s | 6.5 |
| 2009 | 27.2°C | 21.9°C | 16.6°C | 31.3°C | 11.9°C | 105 mm | 74% | 0.9 m/s | 5.9 |
| 2008 | 29.8°C | 24.4°C | 18.9°C | 34.3°C | 15.0°C | 115 mm | 70% | 0.9 m/s | 6 |
| 2007 | 29.6°C | 23.8°C | 18.0°C | 35.0°C | 10.8°C | 92 mm | 65% | 1 m/s | 6 |
| 2006 | 28.7°C | 24.0°C | 19.4°C | 33.6°C | 13.6°C | 105 mm | 81% | 0.9 m/s | 6 |
| 2005 | 30.1°C | 24.7°C | 19.2°C | 34.6°C | 15.3°C | 150 mm | 73% | 0.9 m/s | 5.8 |
| 2004 | 27.5°C | 22.7°C | 17.9°C | 30.1°C | 14.6°C | 204 mm | 80% | 0.9 m/s | 5.1 |
| 2003 | 27.4°C | 22.7°C | 18.0°C | 30.3°C | 14.2°C | 102 mm | 81% | 1 m/s | 5.9 |
| 2002 | 32.4°C | 25.8°C | 19.3°C | 37.5°C | 12.6°C | 39 mm | 56% | 1 m/s | 6.2 |
| 2001 | 29.6°C | 23.1°C | 16.5°C | 35.4°C | 11.6°C | 62 mm | 60% | 1 m/s | 6.3 |
| 2000 | 27.5°C | 21.8°C | 16.1°C | 32.2°C | 11.1°C | 96 mm | 69% | 0.9 m/s | 5.4 |
| 1999 🔥 | 34.0°C | 27.0°C | 20.0°C | 38.9°C | 13.3°C | 36 mm | 53% | 1 m/s | 6 |
| 1998 | 28.3°C | 22.7°C | 17.2°C | 32.5°C | 12.2°C | 73 mm | 72% | 0.9 m/s | 5.8 |
| 1997 | 30.8°C | 24.1°C | 17.4°C | 37.3°C | 12.2°C | 89 mm | 58% | 1 m/s | 6.2 |
| 1996 | 26.2°C | 21.3°C | 16.5°C | 29.4°C | 11.1°C | 179 mm | 81% | 1 m/s | 5.5 |
| 1995 | 30.2°C | 24.6°C | 19.1°C | 36.1°C | 11.7°C | 112 mm | 71% | 0.9 m/s | 5.6 |
| 1994 | 29.2°C | 24.2°C | 19.2°C | 34.1°C | 15.3°C | 162 mm | 76% | 0.8 m/s | 5.5 |
| 1993 | 30.8°C | 24.9°C | 19.0°C | 35.1°C | 14.1°C | 77 mm | 65% | 1 m/s | 5.9 |
| 1992 | 28.7°C | 23.4°C | 18.1°C | 34.6°C | 13.4°C | 118 mm | 72% | 1 m/s | 5.7 |
| 1991 | 31.7°C | 25.4°C | 19.1°C | 37.7°C | 14.4°C | 84 mm | 60% | 0.9 m/s | 5.8 |
| 1990 | 29.1°C | 23.5°C | 17.9°C | 35.0°C | 13.2°C | 108 mm | 75% | 1 m/s | 5.4 |
| 1989 | 26.8°C | 22.3°C | 17.8°C | 30.7°C | 13.2°C | 187 mm | 83% | 0.9 m/s | 5.4 |
| 1988 | 31.7°C | 25.5°C | 19.4°C | 37.7°C | 9.1°C | 165 mm | 64% | 0.9 m/s | 5.8 |
| 1987 | 31.6°C | 25.6°C | 19.5°C | 37.3°C | 12.3°C | 83 mm | 65% | 0.8 m/s | 6.1 |
| 1986 | 31.3°C | 25.0°C | 18.7°C | 36.6°C | 11.4°C | 114 mm | 65% | 1 m/s | 5.7 |
| 1985 | 29.8°C | 23.7°C | 17.5°C | 33.5°C | 12.6°C | 140 mm | 66% | 1 m/s | 6.2 |
| 1984 ❄️ | 25.7°C | 21.0°C | 16.3°C | 30.0°C | 10.5°C | 152 mm | 82% | 1 m/s | 5.1 |
| 1983 | 29.3°C | 23.2°C | 17.1°C | 34.6°C | 10.3°C | 29 mm | 71% | 0.9 m/s | — |
| 1982 | 28.1°C | 22.6°C | 17.1°C | 33.8°C | 9.7°C | 67 mm | 75% | 0.8 m/s | — |
| 1981 | 29.6°C | 23.4°C | 17.3°C | 34.1°C | 11.6°C | 102 mm | 66% | 1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 29.9°C with lows near 18.6°C (mean 24.3°C), based on 45 years of NASA POWER data.
July averages 116 mm of rainfall in Lancaster, a relatively wet time of year. The wettest on record was 220 mm in 2018.
The hottest July reached 39.2°C in 2010. The coldest dipped to 9.1°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.8°C. Daytime highs moved from 28.5°C to 31.2°C and overnight lows from 17.1°C to 20°C over the same span.
July is one of the warmer months of the year in Lancaster and a relatively wet time of year, so plan for around 29.9°C daytime highs and 18.6°C at night.
Not quite — July is the 12th coolest month in Lancaster, averaging 24.3°C.
For July in Lancaster, pack light layers you can adjust through the day, with typical highs of 29.9°C and lows of 18.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 70% — moderately humid.
Average wind speed in July is 0.9 m/s. The windiest July on record averaged 1 m/s (1981).
The wettest July on record was 2018 with 220 mm. On average, July sees 116 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 Lancaster 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.
