Arches weather, month by month
- Jul high
- 99°F
- hottest month
- Jan low
- 22°F
- coldest month
- Rain + snowmelt
- 8.4in / yr
- wettest: Oct
- Snowfall
- 8.1in / yr
- Dec–Feb
- Days ≥ 90°F
- 101/ yr
- Nights ≤ 32°F
- 112/ yr
Arches NP HQ
Month by month
| Month | High | Low | Rain | Snow | Wet days | Sunrise | Sunset | Daylight | Crowds |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 42° | 22° | 0.6″ | 2.1″ | 4 | 7:35 AM | 5:20 PM | 9h 45m | 19 |
| Feb | 50° | 29° | 0.6″ | 1.2″ | 5 | 7:10 AM | 5:55 PM | 10h 46m | 26 |
| Mar | 62° | 37° | 0.7″ | 0.5″ | 5 | 7:30 AM | 7:25 PM | 11h 55m | 74 |
| Apr | 70° | 44° | 0.7″ | — | 5 | 6:42 AM | 7:55 PM | 13h 12m | 83 |
| May | 80° | 53° | 0.8″ | — | 5 | 6:06 AM | 8:23 PM | 14h 17m | 100 |
| Jun | 93° | 63° | 0.4″ | — | 2 | 5:53 AM | 8:45 PM | 14h 52m | 97 |
| Jul | 99° | 70° | 0.7″ | — | 5 | 6:06 AM | 8:43 PM | 14h 37m | 87 |
| Aug | 96° | 68° | 0.9″ | — | 6 | 6:32 AM | 8:14 PM | 13h 41m | 77 |
| Sep | 87° | 58° | 0.9″ | — | 5 | 7:00 AM | 7:28 PM | 12h 28m | 84 |
| Oct | 72° | 44° | 1.1″ | 0.1″ | 6 | 7:27 AM | 6:41 PM | 11h 13m | 77 |
| Nov | 56° | 33° | 0.6″ | 0.7″ | 4 | 7:00 AM | 5:05 PM | 10h 05m | 44 |
| Dec | 42° | 24° | 0.6″ | 3.5″ | 4 | 7:29 AM | 4:58 PM | 9h 29m | 25 |
Sweet spot: November combines 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. 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 Arches 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.Arches National Park — Weather (nps.gov) · National Park Service
- 3.Arches National Park — Visitor Use Statistics · National Park Service (IRMA)
FAQ
Arches weather questions
- What is the hottest month at Arches?
- July, with an average high of 99°F and an average low of 70°F at Arches NP HQ (NOAA 1991–2020 normals). The station averages 101 days a year at or above 90°F.
- How cold does Arches get in winter?
- January is the coldest month, averaging a low of 22°F and a high of 42°F at Arches NP HQ. About 112 nights a year drop to freezing or below.
- Does it snow at Arches?
- Yes. Arches NP HQ averages 8.1 inches of snow a year, mostly in January, February and December. Higher ground in the park gets more.
- When is the rainy season at Arches?
- October is the wettest month on average (1.1 inches of precipitation at Arches NP HQ); the station's annual total is 8.4 inches.
- How many hours of daylight does Arches get?
- About 14h 52m on June 15 and 9h 29m on December 15 (sunrise 5:53 AM, sunset 8:45 PM in June; 7:29 AM to 4:58 PM in December, America/Denver time).
- What is the best month to visit Arches for weather?
- By NOAA's normals, average highs sit between 55°F and 85°F in March, April, May, October and November. Of those, November is also well below the park's peak crowds. Weather in the park varies with elevation; this is the Arches NP HQ station.
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