Climateby Month

Jackson, WY climate by month

NOAA 1991-2020 normals · 6,238 ft elevation

Summers in Jackson are mild; winters are very cold and snowy. Highs peak at 79°F in July and fall to 26°F in January. Wet days are spread through the year, from about 7 to 14 a month. Normal snowfall is about 78 in a year. The most comfortable time to visit is June and September.

Warmest month
79°F
July normal high
Coldest month
6°F
January normal low
Wet days a year
117
17.6 in of precipitation
Snow a year
78.2 in
normal snowfall

How warm is Jackson?

Normal highs range from 26°F in January to 79°F in July.

0°20°40°60°80° January: normal high 26°F (-3°C), low 6°F (-14°C) 26° 6° February: normal high 30°F (-1°C), low 9°F (-13°C) March: normal high 40°F (4°C), low 18°F (-8°C) April: normal high 50°F (10°C), low 26°F (-3°C) May: normal high 60°F (16°C), low 32°F (0°C) June: normal high 70°F (21°C), low 38°F (3°C) July: normal high 79°F (26°C), low 41°F (5°C) 79° 41° August: normal high 78°F (26°C), low 40°F (4°C) September: normal high 68°F (20°C), low 33°F (1°C) October: normal high 55°F (13°C), low 25°F (-4°C) November: normal high 38°F (3°C), low 16°F (-9°C) December: normal high 26°F (-3°C), low 7°F (-14°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Jackson?

December has the most wet days (about 14); the year brings about 18 in of precipitation.

January: 13 wet days February: 10 wet days March: 9 wet days April: 9 wet days May: 11 wet days June: 10 wet days July: 7 wet days 7 August: 8 wet days September: 8 wet days October: 9 wet days November: 10 wet days December: 14 wet days 14 JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 78.2 in a year, most of it in January.

January: 19.1 in of snow 19.1 February: 15.6 in of snow March: 9.2 in of snow April: 4.2 in of snow May: 0.6 in of snow June: 0.0 in of snow 0.0 July: 0.0 in of snow August: 0.0 in of snow September: 0.1 in of snow October: 2.0 in of snow November: 11.0 in of snow December: 16.4 in of snow JFMAMJJASOND

How humid is Jackson?

Muggy days (dew point 65°F or higher) are rare in any month.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 0 muggy days August: 0 muggy days September: 0 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Rexburg-Madison County Apt, 58 mi WNW of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 9.0 hours in December to 15.4 hours in June.

January: 9.4 hours of daylight February: 10.5 hours of daylight March: 11.9 hours of daylight April: 13.4 hours of daylight May: 14.7 hours of daylight June: 15.4 hours of daylight 15.4 July: 15.0 hours of daylight August: 13.9 hours of daylight September: 12.5 hours of daylight October: 11.0 hours of daylight November: 9.7 hours of daylight December: 9.0 hours of daylight 9.0 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Jackson, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 26°F6°F 1.4 in13 19.1 in 0 9.4 h
February 30°F9°F 1.4 in10 15.6 in 0 10.5 h
March 40°F18°F 1.3 in9 9.2 in 0 11.9 h
April 50°F26°F 1.5 in9 4.2 in 0 13.4 h
May 60°F32°F 1.8 in11 0.6 in 0 14.7 h
June 70°F38°F 1.6 in10 0.0 in 0 15.4 h
July 79°F41°F 1.1 in7 0.0 in 0 15.0 h
August 78°F40°F 1.1 in8 0.0 in 0 13.9 h
September 68°F33°F 1.6 in8 0.1 in 0 12.5 h
October 55°F25°F 1.6 in9 2.0 in 0 11.0 h
November 38°F16°F 1.4 in10 11.0 in 0 9.7 h
December 26°F7°F 1.8 in14 16.4 in 0 9.0 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Jackson

By our comfort score, the best months are June and September.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 240528
Feb 290523
Mar 410413
Apr 53354
May 711360
Jun 811850
Jul 691033
Aug 711341
Sep 782140
Oct 54752
Nov 320517
Dec 220628

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Jackson

The last spring frost typically comes around Jun 24, and the first fall frost around Aug 28, leaving 63 frost-free days in a typical year.

Frost and freeze dates for Jackson
Typical date1 year in 10
Last spring frost (32°F)Jun 24after Jul 11
First fall frost (32°F)Aug 28before Aug 8
Last hard freeze (28°F)Jun 7after Jun 23
First hard freeze (28°F)Sep 12before Aug 24
Frost-free season63 daysunder 39 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Moose 1 Nne (USW00004131), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Wyoming.

Hottest and coldest readings, 1991-2020

The highest reading was 97°F (July 24, 2003, and 1 other day); the lowest was -34°F (February 3, 1996).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Jackson

Similar climates elsewhere

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).

Distances from the city center (USGS). Methodology · Report an error