July is one of the warmer months of the year in Thornton, with average highs near 17.3°C and lows around 13°C (mean 15.2°C). It is about average for rainfall, averaging 86 mm of rainfall and 84% relative humidity across the period.
July is one of the warmer months of the year in Thornton. Across 45 years of records, the warmest July in Thornton was 2006 — when the month averaged 17.3°C — while the coldest were 1988 and 1993 at 13.5°C. Typical July days reach 17.3°C with nights near 13°C. The long-term trend is warming, about 0.2°C per decade.
July is about average for rainfall in Thornton, averaging 86 mm of rainfall. The wettest July on record was 2023 with 172 mm, while the driest was 1984 at 23 mm.
Relative humidity in Thornton during July averages 84%. The most humid July was 2002 at 87%, and the least humid was 2018 at 80%.
July receives about 4.9 kWh/m²/day of solar energy in Thornton. The sunniest July was 2006 at 6 kWh/m²/day, and the cloudiest was 2010 at 4.1.
Average wind speed in Thornton during July is 3.9 m/s. The windiest July was 1988 at 5.2 m/s, while the calmest was 1983 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.8°C | 14.9°C | 15.1°C | 15.4°C | 15.7°C | +0.9°C |
| Avg High | 17.0°C | 17.3°C | 17.2°C | 17.6°C | 17.8°C | +0.8°C |
| Avg Low | 12.6°C | 12.7°C | 13.0°C | 13.2°C | 13.6°C | +1°C |
| Avg Rain | 71 mm | 70 mm | 92 mm | 100 mm | 100 mm | +29 mm |
July temperatures in Thornton have risen by about 0.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8.9°C (1990) to a record high of 27.2°C (2022).
Rainfall in July is about average for rainfall, averaging 86 mm, with a wettest year of 172 mm.
One of the best times to visit Thornton
July is one of the best times to visit Thornton. Expect days averaging 17.3°C and nights around 13°C (mean 15.2°C) — warmer than Thornton's yearly average — with higher rainfall (86 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 | 18.6°C | 16.5°C | 14.4°C | 24.1°C | 11.4°C | 82 mm | 84% | 3.8 m/s | 5 |
| 2024 | 17.2°C | 15.1°C | 13.0°C | 21.8°C | 10.7°C | 86 mm | 84% | 3.3 m/s | 4.5 |
| 2023 🌧️ | 17.1°C | 15.3°C | 13.5°C | 20.9°C | 11.6°C | 172 mm | 85% | 4.9 m/s | 4.6 |
| 2022 | 18.5°C | 16.2°C | 14.0°C | 27.2°C | 12.0°C | 61 mm | 83% | 3.9 m/s | 5 |
| 2021 | 19.1°C | 16.8°C | 14.5°C | 24.7°C | 12.1°C | 69 mm | 84% | 2.7 m/s | 5.2 |
| 2020 | 16.0°C | 14.2°C | 12.4°C | 23.3°C | 10.5°C | 131 mm | 85% | 4.7 m/s | 4.2 |
| 2019 | 18.3°C | 16.2°C | 14.1°C | 24.7°C | 10.5°C | 129 mm | 85% | 3.8 m/s | 4.8 |
| 2018 | 19.6°C | 17.0°C | 14.3°C | 22.8°C | 12.5°C | 59 mm | 80% | 3 m/s | 5.4 |
| 2017 | 16.9°C | 14.8°C | 12.8°C | 21.4°C | 10.3°C | 118 mm | 85% | 4.2 m/s | 5 |
| 2016 | 16.9°C | 15.0°C | 13.1°C | 24.2°C | 10.5°C | 98 mm | 86% | 4.4 m/s | 4.7 |
| 2015 | 16.4°C | 14.3°C | 12.2°C | 23.4°C | 10.2°C | 98 mm | 83% | 4.5 m/s | 4.7 |
| 2014 | 18.7°C | 16.3°C | 13.9°C | 23.5°C | 11.9°C | 67 mm | 82% | 3.4 m/s | 5.3 |
| 2013 | 19.3°C | 16.7°C | 14.1°C | 24.7°C | 10.8°C | 76 mm | 84% | 2.9 m/s | 5.6 |
| 2012 | 15.9°C | 14.2°C | 12.4°C | 19.0°C | 9.5°C | 123 mm | 87% | 3.8 m/s | 4.2 |
| 2011 | 16.7°C | 14.4°C | 12.2°C | 19.8°C | 9.5°C | 85 mm | 81% | 3.3 m/s | 5.1 |
| 2010 | 17.0°C | 15.2°C | 13.3°C | 19.4°C | 10.2°C | 149 mm | 86% | 4.6 m/s | 4.1 |
| 2009 | 17.1°C | 15.3°C | 13.4°C | 22.8°C | 11.6°C | 155 mm | 85% | 4.6 m/s | 4.7 |
| 2008 | 17.3°C | 15.2°C | 13.0°C | 22.2°C | 10.2°C | 109 mm | 86% | 4.6 m/s | 4.6 |
| 2007 | 16.1°C | 14.4°C | 12.6°C | 18.4°C | 10.6°C | 149 mm | 86% | 4.6 m/s | 4.5 |
| 2006 🔥 | 20.1°C | 17.3°C | 14.4°C | 24.4°C | 10.9°C | 35 mm | 82% | 3.3 m/s | 6 |
| 2005 | 17.5°C | 15.4°C | 13.2°C | 24.1°C | 11.0°C | 60 mm | 85% | 3.7 m/s | 4.7 |
| 2004 | 16.1°C | 14.2°C | 12.4°C | 20.7°C | 10.3°C | 84 mm | 85% | 4 m/s | 4.6 |
| 2003 | 18.0°C | 15.8°C | 13.7°C | 23.3°C | 11.7°C | 88 mm | 86% | 4.3 m/s | 4.6 |
| 2002 | 16.0°C | 14.0°C | 12.1°C | 20.6°C | 10.3°C | 92 mm | 87% | 3.6 m/s | 4.5 |
| 2001 | 17.2°C | 15.0°C | 12.8°C | 22.7°C | 10.0°C | 64 mm | 85% | 3.9 m/s | 5 |
| 2000 | 16.5°C | 14.3°C | 12.1°C | 21.0°C | 8.9°C | 80 mm | 85% | 3.4 m/s | 5 |
| 1999 | 18.2°C | 15.5°C | 12.9°C | 23.1°C | 9.6°C | 52 mm | 84% | 3.9 m/s | 5.6 |
| 1998 | 15.9°C | 14.0°C | 12.2°C | 18.4°C | 9.9°C | 100 mm | 86% | 4.8 m/s | 4.6 |
| 1997 | 17.4°C | 15.1°C | 12.8°C | 21.0°C | 9.2°C | 81 mm | 85% | 3.5 m/s | 5.2 |
| 1996 | 16.4°C | 14.2°C | 12.1°C | 20.7°C | 9.4°C | 60 mm | 84% | 3.9 m/s | 5.1 |
| 1995 | 18.7°C | 16.3°C | 13.9°C | 24.2°C | 11.4°C | 67 mm | 84% | 4.1 m/s | 5.2 |
| 1994 | 17.9°C | 15.3°C | 12.7°C | 21.2°C | 10.7°C | 61 mm | 84% | 3.1 m/s | 5.3 |
| 1993 | 15.3°C | 13.5°C | 11.8°C | 17.8°C | 8.9°C | 84 mm | 86% | 5 m/s | 4.6 |
| 1992 | 16.9°C | 14.7°C | 12.5°C | 19.9°C | 10.1°C | 76 mm | 82% | 4.3 m/s | 4.6 |
| 1991 | 18.1°C | 15.7°C | 13.2°C | 22.4°C | 11.6°C | 59 mm | 86% | 4.2 m/s | 4.7 |
| 1990 | 17.7°C | 15.0°C | 12.4°C | 21.3°C | 8.9°C | 56 mm | 82% | 4.4 m/s | 5.3 |
| 1989 | 18.5°C | 16.0°C | 13.5°C | 22.8°C | 11.2°C | 30 mm | 83% | 3.6 m/s | 5.4 |
| 1988 ❄️ | 15.2°C | 13.5°C | 11.8°C | 17.5°C | 10.3°C | 155 mm | 85% | 5.2 m/s | 4.7 |
| 1987 | 16.6°C | 14.4°C | 12.3°C | 19.7°C | 10.0°C | 101 mm | 84% | 4.2 m/s | 4.6 |
| 1986 | 15.6°C | 13.7°C | 11.9°C | 19.5°C | 9.6°C | 75 mm | 86% | 4.2 m/s | 4.3 |
| 1985 | 16.3°C | 14.3°C | 12.4°C | 21.4°C | 10.5°C | 104 mm | 86% | 4.3 m/s | 4.5 |
| 1984 | 17.8°C | 15.2°C | 12.7°C | 21.7°C | 9.5°C | 23 mm | 81% | 3.3 m/s | 5.5 |
| 1983 | 19.3°C | 16.8°C | 14.2°C | 24.4°C | 10.6°C | 41 mm | 84% | 2.6 m/s | — |
| 1982 | 17.9°C | 15.1°C | 12.3°C | 21.0°C | 10.4°C | 36 mm | 83% | 3.4 m/s | — |
| 1981 | 16.0°C | 14.1°C | 12.2°C | 18.3°C | 10.0°C | 73 mm | 85% | 4.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 17.3°C with lows near 13°C (mean 15.2°C), based on 45 years of NASA POWER data.
July averages 86 mm of rainfall in Thornton, about average for rainfall. The wettest on record was 172 mm in 2023.
The hottest July reached 27.2°C in 2022. The coldest dipped to 8.9°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.9°C. Daytime highs moved from 17.5°C to 18.1°C and overnight lows from 12.8°C to 13.9°C over the same span.
July is one of the warmer months of the year in Thornton and about average for rainfall, so plan for around 17.3°C daytime highs and 13°C at night.
Not quite — July is the 11th coolest month in Thornton, averaging 15.2°C.
For July in Thornton, pack light layers you can adjust through the day, with typical highs of 17.3°C and lows of 13°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 84% — quite humid.
Average wind speed in July is 3.9 m/s. The windiest July on record averaged 5.2 m/s (1988).
The wettest July on record was 2023 with 172 mm. On average, July sees 86 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 Thornton 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.
