Casper, WY weather in July
Expect hot weather with some rain in Casper in July, with highs near 89°F and lows near 53°F. Rain falls on about 7 days. It is one of the warmest months in Casper.
- Normal high
- 89°F
- Normal low
- 53°F
- Wet days
- 7
- 1.2 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 86°F | 90°F |
| Normal low | 50°F | 55°F |
| Chance of a wet day | 23% | 22% |
| Sunrise / sunset | 5:30 am / 8:47 pm | 5:55 am / 8:27 pm |
| Daylight | 15.3 h | 14.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical July day
- 6 am60°Fdew point 47°F
- 9 am74°Fdew point 47°F
- Noon83°Fdew point 43°F
- 3 pm86°Fdew point 40°F
- 6 pm82°Fdew point 41°F
- 9 pm69°Fdew point 45°F
NOAA hourly normals (local standard time) from Casper Natrona Co Airport (8 mi away); average wind 9 mph; clear or few clouds in 84% of daytime hours, mostly cloudy or overcast in 10%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F3 of 31
- Hot dayshigh 90°F or more17 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in3 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 1.2 in; a dry July brings about 0.5 in and a wet one about 1.5 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How July varies from year to year
- Warmest July, 1991-20202012: average high 93°F
- Coolest July1992: average high 82°F
- Wettest July2007: 3.5 in
- Driest July2020: 0.02 in
- Highest reading104°F (July 29, 2006)
- Lowest reading34°F (July 2, 1997)
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 | 80°F | 89°F | 87°F |
| Normal low | 45°F | 53°F | 51°F |
| Wet days | 9 | 7 | 6 |
| Comfortable days | 13 | 3 | 4 |
| Daylight | 15.3 h | 15.0 h | 13.9 h |
Highs change by +9°F from June and -2°F into August.
Nearby alternatives in July
- Cooler: Keystone, SD162 mi · high 79°F · 12 wet days
How Casper ranks in July
- Normal high167th warmest of 378 cities; 1st of 4 in Wyoming
- Wet days131st driest of 378
- Comfortable days147th most of 340
What to pack for Casper in July
- Light, breathable clothing – highs near 89°F
- Layers – afternoons near 89°F but nights near 53°F
- Sunglasses and sunscreen – about 15.0 hours of daylight and highs near 89°F
Heating and cooling
July has 14 heating degree days and 200 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Casper in July?
The normal high is 89°F and the normal low is 53°F. From 1991 to 2020 the hottest July reading was 104°F (most recently on July 29, 2006).
Does it rain a lot in Casper in July?
About 7 days in July have at least 0.01 in of precipitation, and the normal total is 1.2 in. The wettest July in 1991-2020 was in 2007 (3.5 in); the driest was in 2020 (0.02 in).
Is July a good time to visit Casper?
July ranks 7th of 12 months on our comfort score for Casper (51 out of 100). It has about 3 comfortable days and about 17 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Casper Natrona Co Airport (USW00024089), 7.9 mi WNW of the city center, 5,338 ft (233 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Natrona County International Airport (725690-24089), 8.4 mi WNW of the city center, 5,319 ft (214 ft higher than the city). Hourly observations, 1991-2020.