April is one of the cooler months of the year in Fort Collins, with average highs near 15.6°C and lows around 0.4°C (mean 8°C). It is a relatively wet time of year, averaging 51 mm of rainfall and 50% relative humidity across the period.
April is one of the cooler months of the year in Fort Collins. Across 45 years of records, the warmest April in Fort Collins was 2012 — when the month averaged 11.7°C — while the coldest was 1983 at 3.3°C. Typical April days reach 15.6°C with nights near 0.4°C. The long-term April temperature trend is broadly flat.
April is a relatively wet time of year in Fort Collins, averaging 51 mm of rainfall. The wettest April on record was 1999 with 167 mm, while the driest was 2022 at 12 mm.
Relative humidity in Fort Collins during April averages 50%. The most humid April was 1983 at 63%, and the least humid was 2022 at 38%.
April receives about 5.5 kWh/m²/day of solar energy in Fort Collins. The sunniest Aprils were 2008 and 2023 at 6.2 kWh/m²/day, and the cloudiest was 2016 at 4.9.
Average wind speed in Fort Collins during April is 2.9 m/s. The windiest Aprils were 1996 and 2022 at 3.5 m/s, while the calmest was 1998 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.1°C | 7.2°C | 8.7°C | 8.0°C | 8.2°C | +0.1°C |
| Avg High | 15.7°C | 14.3°C | 16.6°C | 15.6°C | 16.1°C | +0.4°C |
| Avg Low | 0.5°C | 0.0°C | 1.0°C | 0.5°C | 0.2°C | -0.3°C |
| Avg Rain | 46 mm | 66 mm | 46 mm | 57 mm | 35 mm | -12 mm |
April temperatures in Fort Collins have risen by about 1.1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -14°C (1983) to a record high of 30.1°C (2012).
Rainfall in April is a relatively wet time of year, averaging 51 mm, with a wettest year of 167 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A good time to visit Fort Collins
April is a good time to visit Fort Collins, with days averaging 15.6°C and nights around 0.4°C (mean 8°C, cooler than Fort Collins's yearly average) and moderate rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.5°C | 9.3°C | 1.1°C | 28.5°C | -6.1°C | 23 mm | 46% | 2.6 m/s | 5.6 |
| 2024 | 17.4°C | 9.6°C | 1.7°C | 26.2°C | -4.4°C | 50 mm | 47% | 3.2 m/s | 5.6 |
| 2023 | 15.5°C | 7.7°C | -0.1°C | 27.3°C | -8.9°C | 33 mm | 46% | 2.7 m/s | 6.2 |
| 2022 | 16.3°C | 8.2°C | 0.2°C | 28.4°C | -7.7°C | 12 mm | 38% | 3.5 m/s | 5.9 |
| 2021 | 14.9°C | 7.0°C | -1.0°C | 26.7°C | -8.6°C | 53 mm | 49% | 2.7 m/s | 5.7 |
| 2020 | 15.0°C | 7.3°C | -0.5°C | 27.6°C | -13.5°C | 38 mm | 50% | 2.7 m/s | 5.9 |
| 2019 | 16.5°C | 8.9°C | 1.2°C | 25.7°C | -7.7°C | 46 mm | 53% | 2.6 m/s | 5.1 |
| 2018 | 16.4°C | 8.2°C | 0.0°C | 26.3°C | -6.4°C | 33 mm | 47% | 3.1 m/s | 5.5 |
| 2017 | 16.2°C | 8.5°C | 0.8°C | 25.1°C | -6.7°C | 62 mm | 50% | 2.7 m/s | 5.6 |
| 2016 | 14.7°C | 7.7°C | 0.8°C | 24.3°C | -6.4°C | 66 mm | 56% | 2.9 m/s | 4.9 |
| 2015 | 15.9°C | 8.4°C | 1.0°C | 25.3°C | -3.9°C | 74 mm | 52% | 2.6 m/s | 5.2 |
| 2014 | 15.2°C | 8.0°C | 0.8°C | 25.0°C | -7.8°C | 29 mm | 50% | 3.4 m/s | 5.5 |
| 2013 | 12.1°C | 4.5°C | -3.0°C | 25.3°C | -11.6°C | 79 mm | 55% | 2.9 m/s | 5 |
| 2012 🔥 | 20.0°C | 11.7°C | 3.4°C | 30.1°C | -0.9°C | 29 mm | 43% | 2.7 m/s | 6 |
| 2011 | 14.2°C | 6.9°C | -0.4°C | 23.9°C | -5.5°C | 64 mm | 53% | 3.3 m/s | 5.2 |
| 2010 | 14.8°C | 7.5°C | 0.2°C | 24.3°C | -4.1°C | 89 mm | 55% | 3.1 m/s | 5.3 |
| 2009 | 14.3°C | 7.3°C | 0.3°C | 25.4°C | -8.6°C | 93 mm | 56% | 3.1 m/s | 5.4 |
| 2008 | 14.7°C | 6.7°C | -1.2°C | 25.7°C | -8.8°C | 27 mm | 45% | 3.4 m/s | 6.2 |
| 2007 | 15.5°C | 7.9°C | 0.3°C | 28.5°C | -6.8°C | 46 mm | 54% | 2.9 m/s | 5.3 |
| 2006 | 19.1°C | 10.7°C | 2.4°C | 27.4°C | -4.3°C | 17 mm | 41% | 3.2 m/s | 6 |
| 2005 | 15.7°C | 8.1°C | 0.6°C | 24.6°C | -7.4°C | 51 mm | 53% | 3.1 m/s | 5.4 |
| 2004 | 15.6°C | 8.4°C | 1.3°C | 25.6°C | -7.3°C | 65 mm | 54% | 2.8 m/s | 5 |
| 2003 | 17.3°C | 9.6°C | 1.9°C | 25.7°C | -5.7°C | 64 mm | 50% | 2.6 m/s | 5.2 |
| 2002 | 18.5°C | 9.9°C | 1.3°C | 27.3°C | -7.9°C | 12 mm | 40% | 2.9 m/s | 5.7 |
| 2001 | 17.0°C | 9.2°C | 1.4°C | 26.2°C | -5.1°C | 54 mm | 50% | 2.6 m/s | 5.1 |
| 2000 | 18.1°C | 9.6°C | 1.2°C | 24.7°C | -6.8°C | 35 mm | 45% | 3.2 m/s | 5.5 |
| 1999 🌧️ | 12.2°C | 5.6°C | -0.9°C | 22.5°C | -8.0°C | 167 mm | 58% | 3.4 m/s | 5.2 |
| 1998 | 13.6°C | 6.7°C | -0.3°C | 24.8°C | -5.2°C | 55 mm | 55% | 2.3 m/s | 5.8 |
| 1997 | 11.5°C | 4.6°C | -2.2°C | 23.4°C | -11.9°C | 77 mm | 57% | 3 m/s | 5.5 |
| 1996 | 15.5°C | 8.0°C | 0.5°C | 25.3°C | -5.4°C | 40 mm | 49% | 3.5 m/s | 5.3 |
| 1995 | 12.7°C | 5.9°C | -0.9°C | 21.9°C | -5.9°C | 83 mm | 56% | 2.7 m/s | 5.6 |
| 1994 | 14.9°C | 7.7°C | 0.6°C | 26.5°C | -6.8°C | 53 mm | 55% | 2.8 m/s | 5.1 |
| 1993 | 13.5°C | 6.4°C | -0.7°C | 22.0°C | -5.7°C | 66 mm | 58% | 2.7 m/s | 5.4 |
| 1992 | 19.0°C | 11.1°C | 3.1°C | 28.0°C | -4.9°C | 32 mm | 47% | 2.6 m/s | 5.6 |
| 1991 | 14.7°C | 7.3°C | -0.1°C | 26.3°C | -7.6°C | 41 mm | 49% | 2.5 m/s | 5.5 |
| 1990 | 15.6°C | 8.2°C | 0.9°C | 23.5°C | -6.8°C | 41 mm | 58% | 2.6 m/s | 5 |
| 1989 | 16.8°C | 9.0°C | 1.2°C | 29.5°C | -11.1°C | 34 mm | 46% | 2.9 m/s | 5.4 |
| 1988 | 17.2°C | 8.9°C | 0.6°C | 26.9°C | -8.1°C | 32 mm | 49% | 2.7 m/s | 5.6 |
| 1987 | 18.1°C | 10.1°C | 2.2°C | 26.8°C | -6.5°C | 29 mm | 46% | 3 m/s | 6 |
| 1986 | 15.7°C | 8.3°C | 0.9°C | 24.8°C | -5.6°C | 73 mm | 57% | 3.1 m/s | 5.1 |
| 1985 | 17.7°C | 9.8°C | 1.8°C | 26.8°C | -5.1°C | 44 mm | 47% | 2.9 m/s | 5.4 |
| 1984 | 11.7°C | 4.9°C | -1.8°C | 23.7°C | -6.2°C | 72 mm | 57% | 3.4 m/s | 5.5 |
| 1983 ❄️ | 9.5°C | 3.3°C | -2.8°C | 21.5°C | -14.0°C | 80 mm | 63% | 2.6 m/s | — |
| 1982 | 14.6°C | 6.8°C | -1.1°C | 22.9°C | -6.5°C | 23 mm | 42% | 3.2 m/s | — |
| 1981 | 19.9°C | 11.6°C | 3.3°C | 28.6°C | -5.7°C | 31 mm | 43% | 2.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 15.6°C with lows near 0.4°C (mean 8°C), based on 45 years of NASA POWER data.
April averages 51 mm of rainfall in Fort Collins, a relatively wet time of year. The wettest on record was 167 mm in 1999.
The hottest April reached 30.1°C in 2012. The coldest dipped to -14°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.1°C. Daytime highs moved from 14.7°C to 16.3°C and overnight lows from -0.1°C to 0.4°C over the same span.
April is one of the cooler months of the year in Fort Collins and a relatively wet time of year, so plan for around 15.6°C daytime highs and 0.4°C at night.
Not quite — April is the 6th coolest month in Fort Collins, averaging 8°C.
For April in Fort Collins, pack warm layers and a jacket for chilly mornings, with typical highs of 15.6°C and lows of 0.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 50% — relatively dry.
Average wind speed in April is 2.9 m/s. The windiest April on record averaged 3.5 m/s (1996).
The wettest April on record was 1999 with 167 mm. On average, April sees 51 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
