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Weather by month

Theodore Roosevelt weather, month by month

Last verified NOAA 1991–2020 normalsAmerica/Denver time
Average highs, lows, rain, snow and daylight for every month. Measured at the Medora (South Unit) (2,268 ft, 0 mi from South Unit Visitor Center) — with Watford City 14 S (North Unit) below, because the park's weather changes with elevation.
Jul high
86°F
hottest month
Jan low
3°F
coldest month
Rain + snowmelt
15.8in / yr
wettest: Jun
Snowfall
30.1in / yr
Oct–Apr
Days ≥ 90°F
34/ yr
Nights ≤ 32°F
189/ yr

Medora (South Unit)

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
comfortable highs 55–85°F0°20°40°60°80°32°January: average high 28°F, low 3°F, 0.3 in precipitation28°3°January: 0.3 in precipitationJFebruary: average high 32°F, low 8°F, 0.4 in precipitation32°8°February: 0.4 in precipitationFMarch: average high 44°F, low 18°F, 0.6 in precipitation44°18°March: 0.6 in precipitationMApril: average high 56°F, low 30°F, 1.6 in precipitation56°30°April: 1.6 in precipitationAMay: average high 67°F, low 41°F, 2.6 in precipitation67°41°May: 2.6 in precipitationMJune: average high 77°F, low 50°F, 2.9 in precipitation77°50°June: 2.9 in precipitationJJuly: average high 86°F, low 56°F, 2.1 in precipitation86°56°July: 2.1 in precipitationJAugust: average high 85°F, low 53°F, 1.4 in precipitation85°53°August: 1.4 in precipitationASeptember: average high 74°F, low 43°F, 1.4 in precipitation74°43°September: 1.4 in precipitationSOctober: average high 58°F, low 30°F, 1.2 in precipitation58°30°October: 1.2 in precipitationONovember: average high 42°F, low 18°F, 0.6 in precipitation42°18°November: 0.6 in precipitationNDecember: average high 31°F, low 7°F, 0.6 in precipitation31°7°December: 0.6 in precipitationDrain
MonthHighLowRainSnowWet daysSunriseSunsetDaylightCrowds
Jan28°3°0.3″4.4″67:36 AM4:30 PM8h 55m2
Feb32°8°0.4″7.2″56:59 AM5:17 PM10h 18m2
Mar44°18°0.6″3.8″67:07 AM6:58 PM11h 52m6
Apr56°30°1.6″3.4″76:06 AM7:42 PM13h 36m7
May67°41°2.6″0.4″105:18 AM8:22 PM15h 04m45
Jun77°50°2.9″—114:57 AM8:51 PM15h 54m85
Jul86°56°2.1″—95:13 AM8:46 PM15h 33m100
Aug85°53°1.4″—75:50 AM8:06 PM14h 16m93
Sep74°43°1.4″0.1″76:31 AM7:07 PM12h 36m75
Oct58°30°1.2″1.8″77:12 AM6:07 PM10h 55m34
Nov42°18°0.6″3.0″56:57 AM4:19 PM9h 22m7
Dec31°7°0.6″6.0″67:33 AM4:04 PM8h 31m1

Sweet spot: April, 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.

Also measured at

Watford City 14 S (North Unit)

The North Unit, 70 miles north. 2,027 ft, 0 mi from North Unit Visitor Center.
MonthHighLowRainWet days
Jan24°2°0.5″—
Feb30°7°0.4″—
Mar42°18°0.6″—
Apr56°30°1.2″—
May67°41°2.7″—
Jun76°50°3.1″—
Jul85°56°2.6″—
Aug84°54°1.8″—
Sep74°43°1.6″—
Oct57°31°1.3″—
Nov41°18°0.6″—
Dec28°6°0.6″—

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 Medora (South Unit) because it is South Unit visitor center and park headquarters). 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 Theodore Roosevelt 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. 1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
  2. 2.Theodore Roosevelt National Park — Weather (nps.gov) · National Park Service
  3. 3.Theodore Roosevelt National Park — Visitor Use Statistics · National Park Service (IRMA)

FAQ

Theodore Roosevelt weather questions

What is the hottest month at Theodore Roosevelt?
July, with an average high of 86°F and an average low of 56°F at Medora (South Unit) (NOAA 1991–2020 normals). The station averages 34 days a year at or above 90°F.
How cold does Theodore Roosevelt get in winter?
January is the coldest month, averaging a low of 3°F and a high of 28°F at Medora (South Unit). About 189 nights a year drop to freezing or below.
Does it snow at Theodore Roosevelt?
Yes. Medora (South Unit) averages 30.1 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 Theodore Roosevelt?
June is the wettest month on average (2.9 inches of precipitation at Medora (South Unit)); the station's annual total is 15.8 inches.
How many hours of daylight does Theodore Roosevelt get?
About 15h 54m on June 15 and 8h 31m on December 15 (sunrise 4:57 AM, sunset 8:51 PM in June; 7:33 AM to 4:04 PM in December, America/Denver time).
What is the best month to visit Theodore Roosevelt for weather?
By NOAA's normals, average highs sit between 55°F and 85°F in April, May, June, September and October. Of those, April, May and October are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Medora (South Unit) station.

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