West Yellowstone, MT weather in July
West Yellowstone is mild and mostly dry in July: highs average 79°F and nights drop to about 45°F. Expect about 5 wet days. This is the peak of the warm season in West Yellowstone. A great month for outdoor plans.
- Normal high
- 79°F
- Normal low
- 45°F
- Wet days
- 5
- 1.1 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 74°F | 81°F |
| Normal low | 42°F | 46°F |
| Chance of a wet day | 22% | 17% |
| Sunrise / sunset | 5:43 am / 9:13 pm | 6:09 am / 8:51 pm |
| Daylight | 15.5 h | 14.7 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°F17 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 1.1 in; a dry July brings about 0.5 in and a wet one about 1.4 in (25th and 75th percentiles). About 1 day brings half an inch or more. Snow is very rare.
How July varies from year to year
- Warmest July, 1991-20202007: average high 87°F
- Coolest July1993: average high 67°F
- Wettest July1993: 2.9 in
- Driest July1996: no measurable precipitation
- Highest reading96°F (July 13, 2002)
- Lowest reading27°F (July 12, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 68°F | 79°F | 78°F |
| Normal low | 39°F | 45°F | 43°F |
| Wet days | 11 | 5 | 6 |
| Comfortable days | 19 | 17 | 18 |
| Daylight | 15.5 h | 15.2 h | 14.0 h |
Highs change by +11°F from June and -1°F into August.
Nearby alternatives in July
- Warmer: Billings, MT148 mi · high 86°F · 8 wet days
How West Yellowstone ranks in July
- Normal high335th warmest of 378 cities; 5th of 6 in Montana
- Wet days108th driest of 378
- Comfortable days23rd most of 340
What to pack for West Yellowstone in July
- Layers – afternoons near 79°F but nights near 45°F
- Sunglasses and sunscreen – about 15.2 hours of daylight and highs near 79°F
Heating and cooling
July has 123 heating degree days and 19 cooling degree days (base 65°F), 1% of the year's total heating and cooling demand.
Questions
How hot is West Yellowstone in July?
The normal high is 79°F and the normal low is 45°F. From 1991 to 2020 the hottest July reading was 96°F (July 13, 2002).
Does it rain a lot in West Yellowstone in July?
About 5 days in July have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest July in 1991-2020 was in 1993 (2.9 in); the driest was in 1996, with no measurable precipitation.
Is July a good time to visit West Yellowstone?
July ranks 1st of 12 months on our comfort score for West Yellowstone (77 out of 100). It has about 17 comfortable days and about 1 day at 90°F or hotter. The best months are June, July and August.
Where the numbers come from
- Temperature, snowfall, snow depth and frost dates: Hebgen Dam (USC00244038), 18 mi NW of the city center, 6,489 ft (178 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain: Whiskey Creek (USS0011E30S), 4.2 mi SSW of the city center, 6,800 ft (133 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Yellowstone (726664-94173), 35 mi ESE of the city center, 7,782 ft (1,115 ft higher 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).