July is one of the warmer months of the year in Hartford, with average highs near 28.2°C and lows around 16.7°C (mean 22.5°C). It is about average for rainfall, averaging 111 mm of rainfall and 74% relative humidity across the period.
July is one of the warmer months of the year in Hartford. Across 45 years of records, the warmest July in Hartford was 2020 — when the month averaged 25°C — while the coldest was 2009 at 19.7°C. Typical July days reach 28.2°C with nights near 16.7°C. The long-term trend is warming, about 0.5°C per decade.
July is about average for rainfall in Hartford, averaging 111 mm of rainfall. The wettest July on record was 2023 with 279 mm, while the driest was 2002 at 47 mm.
Relative humidity in Hartford during July averages 74%. The most humid July was 2021 at 85%, and the least humid was 1999 at 61%.
July receives about 5.9 kWh/m²/day of solar energy in Hartford. The sunniest Julys were 2018, 2019 and 2022 at 6.5 kWh/m²/day, and the cloudiest was 2021 at 5.
Average wind speed in Hartford during July is 0.1 m/s. The windiest Julys were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2003, 2005 and 2006, among others at 0 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.5°C | 22.3°C | 21.9°C | 23.3°C | 23.7°C | +2.2°C |
| Avg High | 27.3°C | 28.3°C | 27.6°C | 29.1°C | 29.1°C | +1.8°C |
| Avg Low | 15.8°C | 16.2°C | 16.2°C | 17.6°C | 18.2°C | +2.4°C |
| Avg Rain | 116 mm | 92 mm | 111 mm | 99 mm | 156 mm | +40 mm |
July temperatures in Hartford have risen by about 2.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.2°C (1988) to a record high of 38.3°C (2018).
Rainfall in July is about average for rainfall, averaging 111 mm, with a wettest year of 279 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
One of the best times to visit Hartford
July is one of the best times to visit Hartford. Expect days averaging 28.2°C and nights around 16.7°C (mean 22.5°C) — warmer than Hartford's yearly average — with higher rainfall (111 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 | 30.3°C | 24.3°C | 18.4°C | 37.4°C | 12.4°C | 118 mm | 74% | 0.1 m/s | 6 |
| 2024 | 28.5°C | 23.5°C | 18.6°C | 31.9°C | 13.8°C | 129 mm | 80% | 0.1 m/s | 5.7 |
| 2023 🌧️ | 28.1°C | 23.3°C | 18.5°C | 33.5°C | 13.4°C | 279 mm | 84% | 0.1 m/s | 5.8 |
| 2022 | 30.9°C | 24.5°C | 18.2°C | 36.7°C | 13.3°C | 61 mm | 64% | 0.1 m/s | 6.5 |
| 2021 | 25.8°C | 21.3°C | 16.8°C | 30.4°C | 10.2°C | 270 mm | 85% | 0.1 m/s | 5 |
| 2020 🔥 | 31.0°C | 25.0°C | 18.9°C | 35.9°C | 15.2°C | 78 mm | 71% | 0.1 m/s | 6.1 |
| 2019 | 29.5°C | 24.0°C | 18.4°C | 34.0°C | 14.2°C | 100 mm | 75% | 0.1 m/s | 6.5 |
| 2018 | 29.4°C | 23.5°C | 17.6°C | 38.3°C | 11.8°C | 153 mm | 75% | 0.1 m/s | 6.5 |
| 2017 | 26.9°C | 21.5°C | 16.2°C | 31.5°C | 12.0°C | 111 mm | 78% | 0.1 m/s | 5.7 |
| 2016 | 31.3°C | 24.5°C | 17.8°C | 35.4°C | 13.3°C | 70 mm | 64% | 0.1 m/s | 6.3 |
| 2015 | 28.5°C | 22.6°C | 16.7°C | 34.6°C | 12.4°C | 76 mm | 73% | 0.1 m/s | 6 |
| 2014 | 27.1°C | 21.8°C | 16.6°C | 31.3°C | 12.6°C | 149 mm | 77% | 0.1 m/s | 6.1 |
| 2013 | 28.1°C | 23.7°C | 19.3°C | 33.0°C | 14.2°C | 98 mm | 82% | 0.1 m/s | 5.7 |
| 2012 | 30.8°C | 24.4°C | 18.1°C | 36.2°C | 13.3°C | 78 mm | 66% | 0.1 m/s | 6 |
| 2011 | 28.3°C | 22.9°C | 17.4°C | 34.7°C | 12.3°C | 73 mm | 77% | 0.1 m/s | 6.3 |
| 2010 | 30.7°C | 24.5°C | 18.3°C | 37.6°C | 11.3°C | 79 mm | 67% | 0.1 m/s | 6.2 |
| 2009 ❄️ | 24.5°C | 19.7°C | 14.9°C | 28.6°C | 10.4°C | 247 mm | 83% | 0.1 m/s | 5.7 |
| 2008 | 28.1°C | 22.8°C | 17.5°C | 33.1°C | 14.0°C | 171 mm | 78% | 0.1 m/s | 6 |
| 2007 | 27.5°C | 21.9°C | 16.2°C | 33.6°C | 9.6°C | 118 mm | 74% | 0.1 m/s | 6 |
| 2006 | 27.6°C | 22.7°C | 17.8°C | 31.1°C | 13.5°C | 81 mm | 83% | 0 m/s | 5.8 |
| 2005 | 28.8°C | 22.9°C | 16.9°C | 34.8°C | 12.3°C | 101 mm | 75% | 0 m/s | 5.7 |
| 2004 | 27.7°C | 22.1°C | 16.4°C | 32.0°C | 13.4°C | 108 mm | 74% | 0.1 m/s | 5.4 |
| 2003 | 27.9°C | 22.4°C | 16.9°C | 31.2°C | 13.1°C | 62 mm | 76% | 0 m/s | 5.8 |
| 2002 | 31.1°C | 24.1°C | 17.1°C | 37.4°C | 11.5°C | 47 mm | 61% | 0 m/s | 6.4 |
| 2001 | 27.6°C | 20.8°C | 14.0°C | 36.1°C | 9.2°C | 50 mm | 64% | 0.1 m/s | 6.4 |
| 2000 | 25.2°C | 19.8°C | 14.4°C | 28.5°C | 10.7°C | 123 mm | 76% | 0.1 m/s | 5.5 |
| 1999 | 31.7°C | 24.8°C | 17.8°C | 36.8°C | 11.9°C | 51 mm | 61% | 0.1 m/s | 6.2 |
| 1998 | 26.5°C | 21.1°C | 15.7°C | 30.5°C | 12.4°C | 49 mm | 77% | 0.1 m/s | 6.1 |
| 1997 | 28.6°C | 21.9°C | 15.3°C | 34.1°C | 10.3°C | 92 mm | 67% | 0.1 m/s | 6.3 |
| 1996 | 25.0°C | 20.1°C | 15.2°C | 28.3°C | 11.0°C | 187 mm | 81% | 0.1 m/s | 5.5 |
| 1995 | 30.6°C | 24.0°C | 17.4°C | 36.8°C | 10.6°C | 85 mm | 68% | 0.1 m/s | 5.7 |
| 1994 | 29.7°C | 23.9°C | 18.1°C | 33.6°C | 12.9°C | 106 mm | 74% | 0 m/s | 5.9 |
| 1993 | 29.2°C | 22.9°C | 16.5°C | 34.9°C | 13.3°C | 78 mm | 66% | 0 m/s | 6.1 |
| 1992 | 25.6°C | 19.8°C | 14.1°C | 28.6°C | 9.7°C | 125 mm | 78% | 0.1 m/s | 6.1 |
| 1991 | 29.2°C | 22.6°C | 16.0°C | 37.0°C | 10.7°C | 74 mm | 64% | 0.1 m/s | 5.6 |
| 1990 | 26.7°C | 21.4°C | 16.1°C | 30.5°C | 10.3°C | 72 mm | 78% | 0.1 m/s | 5.6 |
| 1989 | 25.8°C | 20.7°C | 15.5°C | 32.4°C | 12.4°C | 115 mm | 82% | 0.1 m/s | 5.6 |
| 1988 | 29.8°C | 23.5°C | 17.3°C | 36.1°C | 6.2°C | 198 mm | 73% | 0.1 m/s | 5.4 |
| 1987 | 28.6°C | 22.5°C | 16.4°C | 34.9°C | 11.4°C | 53 mm | 73% | 0.1 m/s | 5.6 |
| 1986 | 26.5°C | 21.0°C | 15.5°C | 32.1°C | 8.4°C | 141 mm | 77% | 0.1 m/s | 5.7 |
| 1985 | 28.1°C | 21.6°C | 15.1°C | 31.8°C | 9.9°C | 148 mm | 69% | 0 m/s | 6.4 |
| 1984 | 24.9°C | 20.1°C | 15.4°C | 29.9°C | 10.7°C | 146 mm | 84% | 0.1 m/s | 5.8 |
| 1983 | 26.8°C | 21.2°C | 15.5°C | 30.5°C | 9.5°C | 52 mm | 78% | 0 m/s | — |
| 1982 | 26.2°C | 20.5°C | 14.8°C | 30.9°C | 7.7°C | 80 mm | 78% | 0.1 m/s | — |
| 1981 | 28.9°C | 22.6°C | 16.3°C | 33.6°C | 11.6°C | 112 mm | 68% | 0.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 28.2°C with lows near 16.7°C (mean 22.5°C), based on 45 years of NASA POWER data.
July averages 111 mm of rainfall in Hartford, about average for rainfall. The wettest on record was 279 mm in 2023.
The hottest July reached 38.3°C in 2018. The coldest dipped to 6.2°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.2°C. Daytime highs moved from 27°C to 28.7°C and overnight lows from 15.4°C to 18.1°C over the same span.
July is one of the warmer months of the year in Hartford and about average for rainfall, so plan for around 28.2°C daytime highs and 16.7°C at night.
Not quite — July is the 12th coolest month in Hartford, averaging 22.5°C.
For July in Hartford, pack light layers you can adjust through the day, with typical highs of 28.2°C and lows of 16.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 74% — moderately humid.
Average wind speed in July is 0.1 m/s. The windiest July on record averaged 0.1 m/s (1981).
The wettest July on record was 2023 with 279 mm. On average, July sees 111 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 Hartford 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.
