Jackson, WY weather in May
Jackson is cool in May, with frequent rain: highs average 60°F and nights drop to about 32°F. There are about 11 days with rain or snow. Snowfall averages about 0.6 in. A great month for outdoor plans.
- Normal high
- 60°F
- Normal low
- 32°F
- Wet days
- 11
- 1.8 in total
- Snowfall
- 0.6 in
- snow on the ground 1 day
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 55°F | 65°F |
| Normal low | 28°F | 35°F |
| Chance of a wet day | 32% | 37% |
| Sunrise / sunset | 6:15 am / 8:24 pm | 5:45 am / 8:56 pm |
| Daylight | 14.2 h | 15.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below16 of 31
- Snow on the groundsnow depth 1 in or more1 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain and snow in May
Normal precipitation is 1.8 in; a dry May brings about 1.1 in and a wet one about 2.6 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 0.6 in.
How May varies from year to year
- Warmest May, 1991-20201992: average high 71°F
- Coolest May2011: average high 50°F
- Wettest May1993: 3.7 in
- Driest May2007: 0.2 in
- Highest reading90°F (May 29, 2003)
- Lowest reading11°F (May 4, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 50°F | 60°F | 70°F |
| Normal low | 26°F | 32°F | 38°F |
| Wet days | 9 | 11 | 10 |
| Comfortable days | 3 | 13 | 18 |
| Daylight | 13.4 h | 14.7 h | 15.4 h |
Highs change by +10°F from April and +10°F into June.
Nearby alternatives in May
- Warmer: Billings, MT194 mi · high 68°F · 12 wet days
- Drier: Sun Valley, ID180 mi · high 62°F · 8 wet days
How Jackson ranks in May
- Normal high361st warmest of 378 cities; 4th of 4 in Wyoming
- Wet days228th driest of 378
- Comfortable days177th most of 339
What to pack for Jackson in May
- A warm jacket – lows near 32°F, highs near 60°F
- Layers – afternoons near 60°F but nights near 32°F
- A rain jacket or umbrella – rain or snow on about 11 days
- A hat and gloves – about 16 freezing nights
Heating and cooling
May has 592 heating degree days and 0 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How cold is Jackson in May?
The normal high is 60°F and the normal low is 32°F. From 1991 to 2020 the coldest May reading was 11°F (May 4, 2001).
Does it rain a lot in Jackson in May?
About 11 days in May have at least 0.01 in of precipitation, and the normal total is 1.8 in. The wettest May in 1991-2020 was in 1993 (3.7 in); the driest was in 2007 (0.2 in).
Does it snow in Jackson in May?
Yes. Normal snowfall in May is 0.6 in, and snow covers the ground on about 1 day.
Is May a good time to visit Jackson?
May ranks 3rd of 12 months on our comfort score for Jackson (71 out of 100). It has about 13 comfortable days. The best months are June and September.
Where the numbers come from
- Temperature, rain and snowfall: Jackson (USC00484910), 0.5 mi N of the city center, 6,210 ft . NOAA normals and daily records, 1991-2020.
- Snow depth: Moose (USC00486428), 12 mi N of the city center, 6,444 ft (206 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Moose 1 Nne (USW00004131), 13 mi NNE of the city center, 6,466 ft (228 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Rexburg-Madison County Apt (726818-94194), 58 mi WNW of the city center, 4,858 ft (1,380 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: humidity and wind by hour and cloud cover (no station close enough or similar enough in elevation).