What is the hottest month at Grand Teton?

July, with an average high of 82°F and an average low of 44°F at Moose (park headquarters) (NOAA 1991–2020 normals). The station averages 6 days a year at or above 90°F.

How cold does Grand Teton get in winter?

January is the coldest month, averaging a low of 1°F and a high of 27°F at Moose (park headquarters). About 244 nights a year drop to freezing or below.

Does it snow at Grand Teton?

Yes. Moose (park headquarters) averages 165.9 inches of snow a year, mostly in January, February, March, April, October, November and December. Higher ground in the park gets more.

When is the rainy season at Grand Teton?

December is the wettest month on average (2.8 inches of precipitation at Moose (park headquarters)); the station's annual total is 23.0 inches.

How many hours of daylight does Grand Teton get?

About 15h 26m on June 15 and 8h 56m on December 15 (sunrise 5:40 AM, sunset 9:07 PM in June; 7:50 AM to 4:46 PM in December, America/Denver time).

What is the best month to visit Grand Teton for weather?

By NOAA's normals, average highs sit between 55°F and 85°F in May, June, July, August, September and October. Of those, May and October are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Moose (park headquarters) station.

Weather by month

Grand Teton weather, month by month

Last verified October 6, 2026NOAA 1991–2020 normalsAmerica/Denver time

Average highs, lows, rain, snow and daylight for every month. Measured at the Moose (park headquarters) (6,444 ft, 0.1 mi from Craig Thomas Discovery & Visitor Center).

Granite mountains with a cloudy blue sky and green and yellow trees and plants in the foreground — Photo: NPS Photo/Tobiason

Jul high: 82°F; hottest month
Jan low: 1°F; coldest month
Rain + snowmelt: 23.0in / yr; wettest: Dec
Snowfall: 165.9in / yr; Oct–Apr
Days ≥ 90°F: 6/ yr
Nights ≤ 32°F: 244/ yr

Moose (park headquarters)

Month by month

Normals are 30-year averages (1991–2020). Crowds = each month’s share of the park’s busiest month, from NPS visitor counts. Sunrise and sunset are for the 15th of each month in 2027.

Average high and low, every monthbars run from the low to the high · tan strip = precipitation

Month	High	Low	Rain	Snow	Wet days	Sunrise	Sunset	Daylight	Crowds
Jan	27°	1°	2.6″	40.5″	16	7:54 AM	5:10 PM	9h 17m	8
Feb	32°	6°	2.2″	28.4″	15	7:22 AM	5:52 PM	10h 30m	8
Mar	42°	15°	1.8″	19.5″	12	7:35 AM	7:28 PM	11h 53m	9
Apr	50°	24°	1.8″	9.8″	10	6:40 AM	8:06 PM	13h 26m	10
May	62°	33°	2.0″	0.9″	12	5:57 AM	8:41 PM	14h 44m	42
Jun	71°	39°	1.8″	—	11	5:40 AM	9:07 PM	15h 26m	86
Jul	82°	44°	1.1″	—	9	5:55 AM	9:03 PM	15h 09m	100
Aug	81°	42°	1.2″	—	9	6:27 AM	8:28 PM	14h 01m	92
Sep	71°	34°	1.6″	0.3″	8	7:02 AM	7:34 PM	12h 32m	77
Oct	56°	25°	1.7″	4.2″	9	7:37 AM	6:40 PM	11h 03m	34
Nov	39°	15°	2.3″	18.2″	10	7:17 AM	4:58 PM	9h 40m	7
Dec	28°	4°	2.8″	44.1″	16	7:50 AM	4:46 PM	8h 56m	7

Sweet spot: May and October combine average highs between 55°F and 85°F with crowds under 60% of the peak month. Check what is open in those months — quiet can also mean closed roads.

How to read this

These are NOAA’s official 1991–2020 climate normals for one weather station, not a model of the whole park. The station is the one with complete temperature and precipitation normals nearest to a visitor center (we chose Moose (park headquarters) because it is Craig Thomas Discovery & Visitor Center area). Highs and lows are daily averages for the month; “wet days” are days with at least 0.01 inch of precipitation. Mountain parks can be 10–20 °F cooler at their high points than at the station, and the NPS weather page for Grand Teton is the place for current conditions and seasonal closures.

Sunrise and sunset are computed with the NOAA solar equations for the park’s coordinates and shown in America/Denver time for the 15th of each month of 2027; they are accurate to about a minute.

Sources · 3

1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
2.Grand Teton National Park — Weather (nps.gov) · National Park Service
3.Grand Teton National Park — Visitor Use Statistics · National Park Service (IRMA)

FAQ

Grand Teton weather questions

What is the hottest month at Grand Teton?: July, with an average high of 82°F and an average low of 44°F at Moose (park headquarters) (NOAA 1991–2020 normals). The station averages 6 days a year at or above 90°F.
How cold does Grand Teton get in winter?: January is the coldest month, averaging a low of 1°F and a high of 27°F at Moose (park headquarters). About 244 nights a year drop to freezing or below.
Does it snow at Grand Teton?: Yes. Moose (park headquarters) averages 165.9 inches of snow a year, mostly in January, February, March, April, October, November and December. Higher ground in the park gets more.
When is the rainy season at Grand Teton?: December is the wettest month on average (2.8 inches of precipitation at Moose (park headquarters)); the station's annual total is 23.0 inches.
How many hours of daylight does Grand Teton get?: About 15h 26m on June 15 and 8h 56m on December 15 (sunrise 5:40 AM, sunset 9:07 PM in June; 7:50 AM to 4:46 PM in December, America/Denver time).
What is the best month to visit Grand Teton for weather?: By NOAA's normals, average highs sit between 55°F and 85°F in May, June, July, August, September and October. Of those, May and October are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Moose (park headquarters) station.

Park'd · free on iPhone & Android

Plan Grand Teton for the right month.

Park'd keeps your parks, trips and photos in one place — and tells you what to do once you're there.