July is one of the warmer months of the year in Great Falls, with average highs near 28.4°C and lows around 13.2°C (mean 20.8°C). It is about average for rainfall, averaging 39 mm of rainfall and 49% relative humidity across the period.
July is one of the warmer months of the year in Great Falls. Across 45 years of records, the warmest July in Great Falls was 2007 — when the month averaged 25.2°C — while the coldest was 1993 at 14.1°C. Typical July days reach 28.4°C with nights near 13.2°C. The long-term trend is warming, about 0.6°C per decade.
July is about average for rainfall in Great Falls, averaging 39 mm of rainfall. The wettest July on record was 1993 with 146 mm, while the driest was 2003 at 6 mm.
Relative humidity in Great Falls during July averages 49%. The most humid July was 1993 at 69%, and the least humid was 2003 at 37%.
July receives about 7 kWh/m²/day of solar energy in Great Falls. The sunniest July was 2011 at 7.7 kWh/m²/day, and the cloudiest was 1993 at 5.3.
Average wind speed in Great Falls during July is 2.1 m/s. The windiest July was 1999 at 2.5 m/s, while the calmest were 2012, 2021 and 2022, among others at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.1°C | 19.1°C | 22.1°C | 21.1°C | 22.0°C | +1.9°C |
| Avg High | 27.9°C | 26.3°C | 30.0°C | 28.7°C | 29.5°C | +1.6°C |
| Avg Low | 12.3°C | 11.9°C | 14.1°C | 13.6°C | 14.5°C | +2.2°C |
| Avg Rain | 45 mm | 52 mm | 33 mm | 32 mm | 35 mm | -10 mm |
July temperatures in Great Falls have risen by about 2.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 2.1°C (1999) to a record high of 39.6°C (2007).
Rainfall in July is about average for rainfall, averaging 39 mm, with a wettest year of 146 mm.
One of the best times to visit Great Falls
July is one of the best times to visit Great Falls. Expect days averaging 28.4°C and nights around 13.2°C (mean 20.8°C) — warmer than Great Falls's yearly average — with moderate rainfall (39 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 | 27.6°C | 20.4°C | 13.3°C | 34.7°C | 8.5°C | 57 mm | 55% | 2.1 m/s | 6.6 |
| 2024 | 30.1°C | 22.8°C | 15.6°C | 37.2°C | 10.4°C | 21 mm | 47% | 2.1 m/s | 6.9 |
| 2023 | 29.3°C | 21.7°C | 14.0°C | 36.3°C | 7.5°C | 11 mm | 48% | 1.9 m/s | 7.2 |
| 2022 | 30.5°C | 22.8°C | 15.0°C | 36.6°C | 10.9°C | 68 mm | 51% | 1.8 m/s | 7 |
| 2021 | 32.1°C | 24.3°C | 16.5°C | 36.3°C | 11.3°C | 24 mm | 44% | 1.8 m/s | 6.6 |
| 2020 | 27.3°C | 19.9°C | 12.6°C | 33.8°C | 7.4°C | 26 mm | 53% | 2.3 m/s | 7.4 |
| 2019 | 27.2°C | 20.0°C | 12.8°C | 35.5°C | 7.8°C | 40 mm | 55% | 2 m/s | 6.9 |
| 2018 | 28.3°C | 20.7°C | 13.1°C | 34.5°C | 5.5°C | 11 mm | 49% | 1.9 m/s | 7.4 |
| 2017 | 32.4°C | 24.2°C | 16.0°C | 36.8°C | 11.1°C | 17 mm | 42% | 1.9 m/s | 7.6 |
| 2016 | 27.7°C | 20.2°C | 12.7°C | 34.4°C | 6.5°C | 44 mm | 49% | 2.2 m/s | 7 |
| 2015 | 27.1°C | 20.3°C | 13.5°C | 34.4°C | 7.9°C | 61 mm | 50% | 2.2 m/s | 6.3 |
| 2014 | 29.2°C | 21.8°C | 14.3°C | 33.2°C | 9.8°C | 26 mm | 49% | 2.2 m/s | 7.1 |
| 2013 | 29.7°C | 21.9°C | 14.1°C | 36.4°C | 10.6°C | 23 mm | 48% | 2 m/s | 7.5 |
| 2012 | 31.0°C | 23.1°C | 15.3°C | 35.9°C | 8.7°C | 26 mm | 48% | 1.8 m/s | 7.1 |
| 2011 | 28.0°C | 20.2°C | 12.4°C | 35.2°C | 7.8°C | 25 mm | 53% | 2.1 m/s | 7.7 |
| 2010 | 26.1°C | 19.0°C | 11.9°C | 32.0°C | 7.2°C | 42 mm | 55% | 2.1 m/s | 6.9 |
| 2009 | 27.1°C | 19.4°C | 11.8°C | 34.1°C | 7.7°C | 79 mm | 53% | 1.9 m/s | 6.8 |
| 2008 | 28.5°C | 20.8°C | 13.0°C | 34.3°C | 8.6°C | 31 mm | 46% | 2.2 m/s | 7.2 |
| 2007 🔥 | 33.5°C | 25.2°C | 17.0°C | 39.6°C | 10.7°C | 20 mm | 42% | 1.8 m/s | 7.2 |
| 2006 | 31.6°C | 23.3°C | 15.0°C | 36.2°C | 9.8°C | 14 mm | 43% | 2.1 m/s | 7.6 |
| 2005 | 29.5°C | 21.3°C | 13.1°C | 35.2°C | 7.5°C | 14 mm | 45% | 2.3 m/s | 7.4 |
| 2004 | 28.7°C | 21.1°C | 13.5°C | 36.9°C | 7.4°C | 29 mm | 48% | 2.1 m/s | 7.1 |
| 2003 | 32.0°C | 23.7°C | 15.5°C | 38.4°C | 10.8°C | 6 mm | 37% | 2.3 m/s | 7.6 |
| 2002 | 30.3°C | 22.6°C | 14.9°C | 39.3°C | 8.5°C | 40 mm | 47% | 2.3 m/s | 7.1 |
| 2001 | 29.0°C | 21.2°C | 13.5°C | 35.9°C | 10.5°C | 62 mm | 47% | 2 m/s | 6.8 |
| 2000 | 29.9°C | 21.9°C | 14.0°C | 37.3°C | 8.4°C | 35 mm | 44% | 1.9 m/s | 7 |
| 1999 | 27.3°C | 19.1°C | 11.0°C | 35.3°C | 2.1°C | 20 mm | 46% | 2.5 m/s | 7 |
| 1998 | 29.4°C | 22.1°C | 14.8°C | 36.0°C | 11.2°C | 54 mm | 54% | 2 m/s | 7.1 |
| 1997 | 25.6°C | 18.7°C | 11.8°C | 30.4°C | 4.8°C | 46 mm | 58% | 2 m/s | 6.8 |
| 1996 | 28.0°C | 20.4°C | 12.7°C | 35.1°C | 8.2°C | 22 mm | 48% | 2.1 m/s | 7.4 |
| 1995 | 25.0°C | 18.5°C | 11.9°C | 32.4°C | 8.8°C | 96 mm | 61% | 2.2 m/s | 6.4 |
| 1994 | 27.8°C | 20.5°C | 13.2°C | 34.1°C | 7.7°C | 21 mm | 48% | 2 m/s | 6.7 |
| 1993 ❄️ 🌧️ | 19.7°C | 14.1°C | 8.6°C | 32.3°C | 5.3°C | 146 mm | 69% | 1.9 m/s | 5.3 |
| 1992 | 23.7°C | 17.0°C | 10.4°C | 31.3°C | 5.7°C | 56 mm | 57% | 2 m/s | 6.3 |
| 1991 | 28.3°C | 20.4°C | 12.4°C | 35.1°C | 9.3°C | 24 mm | 49% | 2.2 m/s | 7.5 |
| 1990 | 27.7°C | 20.1°C | 12.4°C | 35.6°C | 6.6°C | 31 mm | 50% | 2.1 m/s | 7.1 |
| 1989 | 29.8°C | 21.6°C | 13.4°C | 36.5°C | 8.9°C | 75 mm | 52% | 1.9 m/s | 7.2 |
| 1988 | 29.8°C | 21.3°C | 12.9°C | 35.4°C | 6.8°C | 30 mm | 40% | 2.1 m/s | 6.9 |
| 1987 | 26.2°C | 19.0°C | 11.8°C | 34.8°C | 5.0°C | 82 mm | 53% | 2.2 m/s | 6.4 |
| 1986 | 25.2°C | 17.7°C | 10.3°C | 34.7°C | 5.8°C | 46 mm | 48% | 2.2 m/s | 6.8 |
| 1985 | 31.0°C | 22.8°C | 14.6°C | 36.4°C | 10.2°C | 7 mm | 38% | 2.1 m/s | 7.3 |
| 1984 | 29.3°C | 21.2°C | 13.2°C | 36.4°C | 8.7°C | 7 mm | 44% | 2.1 m/s | 6.8 |
| 1983 | 26.5°C | 18.9°C | 11.3°C | 34.5°C | 6.1°C | 87 mm | 55% | 2.3 m/s | — |
| 1982 | 26.0°C | 19.0°C | 12.1°C | 34.0°C | 6.8°C | 30 mm | 53% | 2.2 m/s | — |
| 1981 | 27.0°C | 19.2°C | 11.4°C | 36.5°C | 5.6°C | 42 mm | 51% | 2.2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 28.4°C with lows near 13.2°C (mean 20.8°C), based on 45 years of NASA POWER data.
July averages 39 mm of rainfall in Great Falls, about average for rainfall. The wettest on record was 146 mm in 1993.
The hottest July reached 39.6°C in 2007. The coldest dipped to 2.1°C in 1999.
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 28°C to 29.9°C and overnight lows from 12.5°C to 14.9°C over the same span.
July is one of the warmer months of the year in Great Falls and about average for rainfall, so plan for around 28.4°C daytime highs and 13.2°C at night.
Not quite — July is the 12th coolest month in Great Falls, averaging 20.8°C.
For July in Great Falls, pack light layers you can adjust through the day, with typical highs of 28.4°C and lows of 13.2°C.
Relative humidity in July averages 49% — relatively dry.
Average wind speed in July is 2.1 m/s. The windiest July on record averaged 2.5 m/s (1999).
The wettest July on record was 1993 with 146 mm. On average, July sees 39 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 Great Falls 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.
