Sun Valley, ID weather in July
July in Sun Valley: warm and mostly dry. Highs 80°F, lows 45°F, rain on about 4 days. This is the peak of the warm season in Sun Valley. A great month for outdoor plans.
- Normal high
- 80°F
- Normal low
- 45°F
- Wet days
- 4
- 0.6 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 76°F | 82°F |
| Normal low | 43°F | 46°F |
| Chance of a wet day | 15% | 15% |
| Sunrise / sunset | 5:59 am / 9:22 pm | 6:25 am / 9:02 pm |
| Daylight | 15.4 h | 14.6 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°F13 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow4 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below1 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 0.6 in; a dry July brings about 0.2 in and a wet one about 0.8 in (25th and 75th percentiles). Days with half an inch or more are rare.
How July varies from year to year
- Warmest July, 1991-20202003: average high 86°F
- Coolest July1993: average high 70°F
- Wettest July2004: 1.4 in
- Driest July2008: no measurable precipitation
- Highest reading98°F (July 13, 2002)
- Lowest reading14°F (July 3, 2010)
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 | 70°F | 80°F | 79°F |
| Normal low | 40°F | 45°F | 44°F |
| Wet days | 8 | 4 | 4 |
| Comfortable days | 19 | 13 | 16 |
| Daylight | 15.4 h | 15.1 h | 13.9 h |
Highs change by +10°F from June and -1°F into August.
Nearby alternatives in July
- Warmer: Boise, ID93 mi · high 93°F · 2 wet days
How Sun Valley ranks in July
- Normal high325th warmest of 378 cities; 2nd of 2 in Idaho
- Wet days84th driest of 378
- Comfortable days34th most of 340
What to pack for Sun Valley in July
- Layers – afternoons near 80°F but nights near 45°F
- Sunglasses and sunscreen – about 15.1 hours of daylight and highs near 80°F
Heating and cooling
July has 114 heating degree days and 38 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Sun Valley in July?
The normal high is 80°F and the normal low is 45°F. From 1991 to 2020 the hottest July reading was 98°F (July 13, 2002).
Does it rain a lot in Sun Valley in July?
About 4 days in July have at least 0.01 in of precipitation, and the normal total is 0.6 in. The wettest July in 1991-2020 was in 2004 (1.5 in); the driest was in 2008, with no measurable precipitation.
Where the numbers come from
- Temperature, rain and snowfall: Ketchum RS (USC00104845), 1.0 mi SSW of the city center, 5,890 ft (62 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Bellevue (USC00100774), 17 mi SSE of the city center, 5,192 ft (760 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Stanley Ranger Station (726824-04112), 44 mi NW of the city center, 6,495 ft (543 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: snow depth, humidity and wind by hour and cloud cover (no station close enough or similar enough in elevation).