Fort Collins weather in May: Fort Collins, Colorado: normal highs, lows, rain and records for May
Fort Collins in May has a normal high of 71°F and a normal low of 44°F, a daily mean of 58°F, rising from 65°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 2.72 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 7°C, 69 mm of precipitation and 4 cm of snow in May.
- NOAA stationFort Collins
- Station IDUSC00053005
- Location40.58°N 105.09°W
- Elevation5,004 ft (1,525 m)
- Population170,924
- Jan 45° 18°
- Feb 47° 21°
- Mar 56° 29°
- Apr 63° 35°
- May 71° 44°
- Jun 82° 53°
- Jul 87° 59°
- Aug 85° 57°
- Sep 77° 48°
- Oct 64° 36°
- Nov 53° 26°
- Dec 44° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fort Collins in May?
The normal high is 71°F and the normal low 44°F, for a daily mean of 57.5°F. May is 8.5°F warmer than April and 9.8°F cooler than June. May is the 5th warmest month of the year in Fort Collins and the wettest. Across the month the normal high rises 12°F, from 65°F on May 1 to 77°F on May 31. From one year to the next May's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Mays in three average between 55°F and 60°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 65°F | 39°F | 34% | 18% |
| May 8 | 68°F | 42°F | 36% | 18% |
| May 15 | 70°F | 44°F | 38% | 18% |
| May 22 | 73°F | 46°F | 38% | 18% |
| May 31 | 77°F | 49°F | 37% | 17% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 65°F | 39°F | 34% | 18% | 13 h 50 min |
| May 2 | 66°F | 40°F | 34% | 18% | 14 h |
| May 3 | 66°F | 40°F | 35% | 18% | 14 h |
| May 4 | 66°F | 40°F | 35% | 18% | 14 h |
| May 5 | 67°F | 41°F | 35% | 18% | 14 h |
| May 6 | 67°F | 41°F | 36% | 18% | 14 h 10 min |
| May 7 | 67°F | 41°F | 36% | 18% | 14 h 10 min |
| May 8 | 68°F | 42°F | 36% | 18% | 14 h 10 min |
| May 9 | 68°F | 42°F | 37% | 18% | 14 h 10 min |
| May 10 | 69°F | 42°F | 37% | 18% | 14 h 10 min |
| May 11 | 69°F | 43°F | 37% | 18% | 14 h 20 min |
| May 12 | 69°F | 43°F | 37% | 18% | 14 h 20 min |
| May 13 | 70°F | 43°F | 37% | 18% | 14 h 20 min |
| May 14 | 70°F | 44°F | 38% | 18% | 14 h 20 min |
| May 15 | 70°F | 44°F | 38% | 18% | 14 h 20 min |
| May 16 | 71°F | 44°F | 38% | 18% | 14 h 30 min |
| May 17 | 71°F | 45°F | 38% | 18% | 14 h 30 min |
| May 18 | 72°F | 45°F | 38% | 18% | 14 h 30 min |
| May 19 | 72°F | 45°F | 38% | 18% | 14 h 30 min |
| May 20 | 72°F | 46°F | 38% | 18% | 14 h 30 min |
| May 21 | 73°F | 46°F | 38% | 18% | 14 h 40 min |
| May 22 | 73°F | 46°F | 38% | 18% | 14 h 40 min |
| May 23 | 74°F | 46°F | 38% | 18% | 14 h 40 min |
| May 24 | 74°F | 47°F | 38% | 18% | 14 h 40 min |
| May 25 | 74°F | 47°F | 38% | 18% | 14 h 40 min |
| May 26 | 75°F | 47°F | 38% | 18% | 14 h 40 min |
| May 27 | 75°F | 48°F | 38% | 18% | 14 h 40 min |
| May 28 | 76°F | 48°F | 38% | 18% | 14 h 50 min |
| May 29 | 76°F | 48°F | 38% | 18% | 14 h 50 min |
| May 30 | 76°F | 49°F | 38% | 18% | 14 h 50 min |
| May 31 | 77°F | 49°F | 37% | 17% | 14 h 50 min |
- Normal high
- 71°FMay average
- Normal low
- 44°FMay average
- Precipitation
- 2.72 inmonth total
- Days with precipitation
- 120.01 inch or more
- Snowfall
- 1.6 inmonth total
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 18
- Days at 80°F or more
- 7
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00053005; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Fort Collins in May?
On a given May day the chance of 0.01 inch or more is 37% on average, highest around May 21 (38%). In all, 2.72 in falls on 12 days of a normal May, 1 of them with an inch or more.
In a normal May in Fort Collins, 1 nights fall to freezing and snowfall averages 1.6 inches.
Snow falls on 1 day in a normal May.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00053005.
What are the records for May in Fort Collins?
The warmest May temperature on this station's record (since 1893) is 97°F, on May 29, 2000; the coldest is 12°F, on May 6, 1917. The wettest May brought 7.47 in (1901); the snowiest, 27.8 inches (1978).
The May mean against the 1991-2020 normal of 57.5°F: 2021 56.2°F (−1.3), 2022 57.7°F (+0.2), 2023 60.0°F (+2.5), 2024 57.8°F (+0.3), 2025 58.6°F (+1.1), 2026 58.6°F (+1.1). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.2°F | −1.3°F | 5.52 in |
| 2022 | 57.7°F | +0.2°F | 2.37 in |
| 2023 | 60.0°F | +2.5°F | 3.33 in |
| 2024 | 57.8°F | +0.3°F | 0.68 in |
| 2025 | 58.6°F | +1.1°F | 2.55 in |
| 2026 | 58.6°F | +1.1°F | 3.68 in |
Source: records: ACIS, station USC00053005; recent months: ACIS, station USC00053005. Records and recent months use complete months only.
How does May in Fort Collins compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, May normal highs run from 54°F in Leadville to 80°F in Lamar; Fort Collins's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.