Gillette weather in May: Gillette, Wyoming: normal highs, lows, rain and records for May
Gillette in May has a normal high of 65°F and a normal low of 39°F, a daily mean of 52°F, rising from 59°F on the 1st to 71°F by the 31st. Measurable precipitation falls on 12 days in a normal May, 2.63 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 4°C, 67 mm of precipitation in May.
- NOAA stationGillette Campbell Airport
- Station IDUSW00094023
- Location44.34°N 105.54°W
- Elevation4,354 ft (1,327 m)
- Population33,846
- Jan 36° 14°
- Feb 37° 15°
- Mar 48° 23°
- Apr 55° 30°
- May 65° 39°
- Jun 77° 48°
- Jul 87° 56°
- Aug 86° 54°
- Sep 75° 44°
- Oct 59° 32°
- Nov 46° 22°
- Dec 36° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Gillette in May?
The normal high is 65°F and the normal low 39°F, for a daily mean of 52.1°F. May is 9.6°F warmer than April and 10.4°F cooler than June. May is the 5th warmest month of the year in Gillette and the wettest. Across the month the normal high rises 12°F, from 59°F on May 1 to 71°F on May 31. From one year to the next May's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Mays in three average between 49°F and 55°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 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 59°F | 34°F | 40% | 18% |
| May 8 | 62°F | 36°F | 40% | 20% |
| May 15 | 65°F | 39°F | 40% | 20% |
| May 22 | 68°F | 41°F | 40% | 21% |
| May 31 | 71°F | 44°F | 39% | 20% |
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 | 59°F | 34°F | 40% | 18% | 14 h 10 min |
| May 2 | 60°F | 34°F | 40% | 19% | 14 h 10 min |
| May 3 | 60°F | 34°F | 40% | 19% | 14 h 20 min |
| May 4 | 60°F | 35°F | 40% | 19% | 14 h 20 min |
| May 5 | 61°F | 35°F | 40% | 19% | 14 h 20 min |
| May 6 | 61°F | 36°F | 40% | 19% | 14 h 20 min |
| May 7 | 62°F | 36°F | 40% | 20% | 14 h 30 min |
| May 8 | 62°F | 36°F | 40% | 20% | 14 h 30 min |
| May 9 | 62°F | 37°F | 40% | 20% | 14 h 30 min |
| May 10 | 63°F | 37°F | 40% | 20% | 14 h 30 min |
| May 11 | 63°F | 37°F | 40% | 20% | 14 h 40 min |
| May 12 | 64°F | 38°F | 40% | 20% | 14 h 40 min |
| May 13 | 64°F | 38°F | 40% | 20% | 14 h 40 min |
| May 14 | 64°F | 39°F | 40% | 20% | 14 h 40 min |
| May 15 | 65°F | 39°F | 40% | 20% | 14 h 40 min |
| May 16 | 65°F | 39°F | 40% | 21% | 14 h 50 min |
| May 17 | 66°F | 40°F | 40% | 21% | 14 h 50 min |
| May 18 | 66°F | 40°F | 40% | 21% | 14 h 50 min |
| May 19 | 66°F | 40°F | 40% | 21% | 14 h 50 min |
| May 20 | 67°F | 41°F | 40% | 21% | 15 h |
| May 21 | 67°F | 41°F | 40% | 21% | 15 h |
| May 22 | 68°F | 41°F | 40% | 21% | 15 h |
| May 23 | 68°F | 42°F | 40% | 21% | 15 h |
| May 24 | 68°F | 42°F | 40% | 21% | 15 h |
| May 25 | 69°F | 42°F | 40% | 21% | 15 h 10 min |
| May 26 | 69°F | 43°F | 40% | 21% | 15 h 10 min |
| May 27 | 69°F | 43°F | 39% | 20% | 15 h 10 min |
| May 28 | 70°F | 43°F | 39% | 20% | 15 h 10 min |
| May 29 | 70°F | 44°F | 39% | 20% | 15 h 10 min |
| May 30 | 71°F | 44°F | 39% | 20% | 15 h 10 min |
| May 31 | 71°F | 44°F | 39% | 20% | 15 h 20 min |
- Normal high
- 65°FMay average
- Normal low
- 39°FMay average
- Precipitation
- 2.63 inmonth total
- Days with precipitation
- 120.01 inch or more
- Nights at 32°F or colder
- 7
- Daylight
- 14 h 10 min to 15 h 20 minMay 1 to May 31
- Days at 70°F or more
- 12
- Days at 80°F or more
- 3
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094023; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Gillette in May?
On a given May day the chance of 0.01 inch or more is 40% on average, highest around May 8 (40%). In all, 2.63 in falls on 12 days of a normal May.
In a normal May in Gillette, 7 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094023.
How humid and windy is Gillette in May?
At 3 p.m. the normal temperature is 68°F with 40% relative humidity and a dew point of 43°F; at 6 a.m. it is 52°F with 75% humidity. The wind averages 9.9 mph, most often from the north-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 52°F | 44°F | 75% | 8.7 mph | 63% |
| 9 a.m. | 61°F | 44°F | 55% | 11.2 mph | 63% |
| noon | 66°F | 44°F | 44% | 11.6 mph | 57% |
| 3 p.m. | 68°F | 43°F | 40% | 11.5 mph | 55% |
| 6 p.m. | 65°F | 44°F | 47% | 11.0 mph | 58% |
| 9 p.m. | 53°F | 44°F | 71% | 7.6 mph | 61% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094023. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Gillette?
The May mean against the 1991-2020 normal of 52.1°F: 2021 52.1°F (at normal), 2022 50.8°F (−1.3), 2023 57.9°F (+5.8), 2024 51.1°F (−1.0), 2025 53.8°F (+1.7), 2026 54.4°F (+2.3). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 52.1°F | at normal | 0.77 in |
| 2022 | 50.8°F | −1.3°F | 3.70 in |
| 2023 | 57.9°F | +5.8°F | 3.29 in |
| 2024 | 51.1°F | −1.0°F | 3.94 in |
| 2025 | 53.8°F | +1.7°F | 2.26 in |
| 2026 | 54.4°F | +2.3°F | 0.32 in |
Source: recent months: ACIS, station USW00094023. Records and recent months use complete months only.
How does May in Gillette compare across Wyoming?
Across the 71 places PlainClimate covers in Wyoming, May normal highs run from 55°F in Sundance to 73°F in Basin; Gillette's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.