June is one of the warmer months of the year in Fort Collins, with average highs near 28.1°C and lows around 11.5°C (mean 19.8°C). It is a relatively wet time of year, averaging 49 mm of rainfall and 44% relative humidity across the period.
June is one of the warmer months of the year in Fort Collins. Across 45 years of records, the warmest June in Fort Collins was 2012 — when the month averaged 23.4°C — while the coldest was 1983 at 16.1°C. Typical June days reach 28.1°C with nights near 11.5°C. The long-term trend is warming, about 0.6°C per decade.
June is a relatively wet time of year in Fort Collins, averaging 49 mm of rainfall. The wettest June on record was 2023 with 117 mm, while the driest was 2006 at 13 mm.
Relative humidity in Fort Collins during June averages 44%. The most humid June was 2023 at 59%, and the least humid was 2012 at 30%.
June receives about 6.9 kWh/m²/day of solar energy in Fort Collins. The sunniest Junes were 2012 and 2013 at 7.5 kWh/m²/day, and the cloudiest was 1992 at 5.9.
Average wind speed in Fort Collins during June is 2.3 m/s. The windiest June was 2012 at 2.8 m/s, while the calmest was 2009 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.1°C | 18.9°C | 19.7°C | 20.7°C | 21.1°C | +2°C |
| Avg High | 27.1°C | 27.1°C | 28.1°C | 29.2°C | 29.4°C | +2.3°C |
| Avg Low | 11.1°C | 10.8°C | 11.3°C | 12.2°C | 12.8°C | +1.7°C |
| Avg Rain | 55 mm | 55 mm | 49 mm | 40 mm | 47 mm | -8 mm |
June temperatures in Fort Collins have risen by about 2.8°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 1.4°C (1998) to a record high of 38.8°C (2012).
Rainfall in June is a relatively wet time of year, averaging 49 mm, with a wettest year of 117 mm.
One of the best times to visit Fort Collins
June is one of the best times to visit Fort Collins. Expect days averaging 28.1°C and nights around 11.5°C (mean 19.8°C) — warmer than Fort Collins's yearly average — with moderate rainfall (49 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 | 30.1°C | 21.4°C | 12.7°C | 36.7°C | 6.1°C | 49 mm | 42% | 2.2 m/s | 7 |
| 2024 | 31.7°C | 23.1°C | 14.4°C | 37.2°C | 9.1°C | 23 mm | 40% | 2.5 m/s | 7 |
| 2023 🌧️ | 24.3°C | 17.6°C | 11.0°C | 33.1°C | 7.5°C | 117 mm | 59% | 2 m/s | 6.1 |
| 2022 | 29.9°C | 21.3°C | 12.6°C | 37.3°C | 4.2°C | 16 mm | 38% | 2.3 m/s | 7 |
| 2021 | 30.8°C | 22.3°C | 13.8°C | 37.9°C | 6.0°C | 34 mm | 39% | 2.3 m/s | 7.1 |
| 2020 | 29.6°C | 21.1°C | 12.5°C | 34.6°C | 3.7°C | 41 mm | 38% | 2.7 m/s | 6.9 |
| 2019 | 26.3°C | 18.4°C | 10.5°C | 34.6°C | 4.5°C | 72 mm | 51% | 2 m/s | 6.4 |
| 2018 | 30.9°C | 21.8°C | 12.8°C | 38.4°C | 5.6°C | 38 mm | 36% | 2.3 m/s | 7.2 |
| 2017 | 29.1°C | 20.6°C | 12.0°C | 36.0°C | 7.2°C | 14 mm | 43% | 2.3 m/s | 7.3 |
| 2016 | 30.8°C | 22.4°C | 14.0°C | 37.6°C | 6.4°C | 27 mm | 43% | 2.2 m/s | 7.3 |
| 2015 | 28.0°C | 20.6°C | 13.3°C | 34.2°C | 9.6°C | 62 mm | 56% | 2 m/s | 6.9 |
| 2014 | 27.9°C | 19.0°C | 10.2°C | 33.1°C | 5.0°C | 35 mm | 45% | 2.3 m/s | 7.4 |
| 2013 | 30.7°C | 21.6°C | 12.5°C | 37.2°C | 4.5°C | 20 mm | 36% | 2.3 m/s | 7.5 |
| 2012 🔥 | 32.5°C | 23.4°C | 14.3°C | 38.8°C | 7.0°C | 19 mm | 30% | 2.8 m/s | 7.5 |
| 2011 | 28.2°C | 19.5°C | 10.7°C | 36.0°C | 5.3°C | 37 mm | 43% | 2.3 m/s | 7.3 |
| 2010 | 27.5°C | 19.3°C | 11.2°C | 35.0°C | 4.5°C | 71 mm | 51% | 2 m/s | 6.9 |
| 2009 | 24.9°C | 17.4°C | 10.0°C | 32.2°C | 5.2°C | 97 mm | 56% | 1.7 m/s | 6.3 |
| 2008 | 27.8°C | 19.1°C | 10.4°C | 34.5°C | 3.6°C | 41 mm | 40% | 2.4 m/s | 7.3 |
| 2007 | 29.0°C | 20.5°C | 12.0°C | 37.1°C | 2.7°C | 19 mm | 39% | 2.4 m/s | 6.9 |
| 2006 | 31.3°C | 22.5°C | 13.6°C | 37.6°C | 9.4°C | 13 mm | 35% | 2.4 m/s | 7.4 |
| 2005 | 26.5°C | 18.5°C | 10.6°C | 33.4°C | 4.5°C | 112 mm | 49% | 2.3 m/s | 6.9 |
| 2004 | 26.0°C | 18.1°C | 10.2°C | 35.9°C | 4.7°C | 79 mm | 49% | 2.3 m/s | 6.1 |
| 2003 | 25.1°C | 17.3°C | 9.6°C | 33.3°C | 3.6°C | 57 mm | 53% | 1.9 m/s | 6.5 |
| 2002 | 31.8°C | 22.7°C | 13.6°C | 37.8°C | 7.1°C | 27 mm | 32% | 2.3 m/s | 7.4 |
| 2001 | 30.2°C | 21.1°C | 11.9°C | 37.6°C | 3.2°C | 22 mm | 37% | 2.2 m/s | 7.2 |
| 2000 | 28.8°C | 19.7°C | 10.7°C | 35.5°C | 4.9°C | 26 mm | 38% | 2.6 m/s | 7.2 |
| 1999 | 26.3°C | 18.1°C | 9.9°C | 32.9°C | 5.4°C | 47 mm | 49% | 2.3 m/s | 7 |
| 1998 | 24.9°C | 16.6°C | 8.3°C | 33.6°C | 1.4°C | 47 mm | 47% | 2.4 m/s | 7.1 |
| 1997 | 27.4°C | 19.6°C | 11.9°C | 33.9°C | 8.8°C | 72 mm | 53% | 2 m/s | 7.2 |
| 1996 | 28.0°C | 19.8°C | 11.7°C | 32.9°C | 5.4°C | 50 mm | 45% | 2.2 m/s | 7 |
| 1995 | 23.5°C | 16.2°C | 9.0°C | 31.0°C | 2.8°C | 99 mm | 58% | 2.1 m/s | 6.7 |
| 1994 | 30.7°C | 22.0°C | 13.2°C | 37.5°C | 7.2°C | 33 mm | 37% | 2.3 m/s | 7.2 |
| 1993 | 25.4°C | 17.4°C | 9.4°C | 33.5°C | 3.3°C | 66 mm | 47% | 2.1 m/s | 7 |
| 1992 | 26.0°C | 18.2°C | 10.4°C | 32.6°C | 4.5°C | 60 mm | 51% | 2.2 m/s | 5.9 |
| 1991 | 28.1°C | 20.0°C | 11.9°C | 36.1°C | 6.5°C | 66 mm | 46% | 2.5 m/s | 6.5 |
| 1990 | 30.7°C | 21.3°C | 11.8°C | 38.2°C | 4.3°C | 13 mm | 36% | 2.4 m/s | 7.2 |
| 1989 | 25.4°C | 17.6°C | 9.9°C | 36.7°C | 3.4°C | 58 mm | 46% | 2.2 m/s | 6.1 |
| 1988 | 29.9°C | 22.0°C | 14.2°C | 36.6°C | 5.3°C | 41 mm | 44% | 2.6 m/s | 6.6 |
| 1987 | 28.3°C | 20.3°C | 12.2°C | 33.1°C | 3.3°C | 55 mm | 45% | 2.1 m/s | 7.2 |
| 1986 | 28.5°C | 20.7°C | 12.9°C | 34.8°C | 6.8°C | 53 mm | 45% | 2.4 m/s | 6.4 |
| 1985 | 28.5°C | 19.5°C | 10.6°C | 36.7°C | 4.9°C | 45 mm | 37% | 2.3 m/s | 6.8 |
| 1984 | 26.4°C | 18.4°C | 10.4°C | 34.2°C | 3.4°C | 57 mm | 47% | 2.2 m/s | 6.3 |
| 1983 ❄️ | 23.5°C | 16.1°C | 8.6°C | 32.3°C | 2.4°C | 78 mm | 56% | 2.2 m/s | — |
| 1982 | 24.0°C | 16.5°C | 9.0°C | 33.9°C | 4.0°C | 73 mm | 52% | 2.1 m/s | — |
| 1981 | 29.5°C | 20.8°C | 12.1°C | 35.0°C | 3.7°C | 33 mm | 42% | 2.4 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 28.1°C with lows near 11.5°C (mean 19.8°C), based on 45 years of NASA POWER data.
June averages 49 mm of rainfall in Fort Collins, a relatively wet time of year. The wettest on record was 117 mm in 2023.
The hottest June reached 38.8°C in 2012. The coldest dipped to 1.4°C in 1998.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.8°C. Daytime highs moved from 26.4°C to 29.4°C and overnight lows from 10.1°C to 12.9°C over the same span.
June is one of the warmer months of the year in Fort Collins and a relatively wet time of year, so plan for around 28.1°C daytime highs and 11.5°C at night.
Not quite — June is the 10th coolest month in Fort Collins, averaging 19.8°C.
For June in Fort Collins, pack light layers you can adjust through the day, with typical highs of 28.1°C and lows of 11.5°C.
Relative humidity in June averages 44% — relatively dry.
Average wind speed in June is 2.3 m/s. The windiest June on record averaged 2.8 m/s (2012).
The wettest June on record was 2023 with 117 mm. On average, June sees 49 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 Fort Collins behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
