Sioux Falls, SD weather in July
Sioux Falls is warm and often humid in July, with some rain: highs average 85°F and nights drop to about 63°F. There are about 9 days with rain. This is the peak of the warm season in Sioux Falls.
- Normal high
- 85°F
- Normal low
- 63°F
- Wet days
- 9
- 3.3 in total
- Muggy days
- 12
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 84°F | 85°F |
| Normal low | 62°F | 63°F |
| Chance of a wet day | 33% | 30% |
| Sunrise / sunset | 5:49 am / 9:11 pm | 6:15 am / 8:51 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 (Central Time).
A typical July day
- 6 am66°Fdew point 61°F
- 9 am74°Fdew point 63°F
- Noon80°Fdew point 63°F
- 3 pm82°Fdew point 63°F
- 6 pm81°Fdew point 63°F
- 9 pm73°Fdew point 64°F
NOAA hourly normals (local standard time) from Sioux Falls (3 mi away); average wind 9 mph; clear or few clouds in 57% of daytime hours, mostly cloudy or overcast in 24%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 31
- Hot dayshigh 90°F or more7 of 31
- Muggy daysdaily mean dew point 65°F or more12 of 31
- Wet daysat least 0.01 in of rain or melted snow9 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 3.3 in; a dry July brings about 1.5 in and a wet one about 4.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202012: average high 94°F
- Coolest July1992: average high 75°F
- Wettest July2010: 8.6 in
- Driest July2012: 0.2 in
- Highest reading107°F (July 12, 1995)
- Lowest reading43°F (July 10, 1996)
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 | 81°F | 85°F | 83°F |
| Normal low | 59°F | 63°F | 61°F |
| Wet days | 12 | 9 | 9 |
| Comfortable days | 11 | 5 | 8 |
| Daylight | 15.4 h | 15.1 h | 13.9 h |
Highs change by +4°F from June and -2°F into August.
Nearby alternatives in July
- Cooler: Rochester, MN213 mi · high 80°F · 11 wet days
How Sioux Falls ranks in July
- Normal high227th warmest of 378 cities; 2nd of 4 in South Dakota
- Wet days179th driest of 378
- Comfortable days113th most of 340
What to pack for Sioux Falls in July
- Light, breathable clothing – highs near 85°F and about 12 muggy days
- A rain jacket or umbrella – rain on about 9 days
- Sunglasses and sunscreen – about 15.1 hours of daylight and highs near 85°F
Heating and cooling
July has 5 heating degree days and 294 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Sioux Falls in July?
The normal high is 85°F and the normal low is 63°F. From 1991 to 2020 the hottest July reading was 107°F (July 12, 1995).
Does it rain a lot in Sioux Falls in July?
About 9 days in July have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest July in 1991-2020 was in 2010 (8.6 in); the driest was in 2012 (0.2 in).
Is July a good time to visit Sioux Falls?
July ranks 6th of 12 months on our comfort score for Sioux Falls (58 out of 100). It has about 5 comfortable days and about 7 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: Sioux Falls (USW00014944), 3.0 mi NNW of the city center, 1,430 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Joe Foss Field Airport (726510-14944), 3.3 mi NW of the city center, 1,419 ft (54 ft lower than the city). Hourly observations, 1991-2020.