Thornton, CO weather in July
July in Thornton: hot, with some rain. Highs 90°F, lows 59°F, about 7 wet days. This is the peak of the warm season in Thornton.
- Normal high
- 90°F
- Normal low
- 59°F
- Wet days
- 7
- 1.7 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 89°F | 90°F |
| Normal low | 57°F | 60°F |
| Chance of a wet day | 22% | 26% |
| Sunrise / sunset | 5:35 am / 8:32 pm | 5:57 am / 8:14 pm |
| Daylight | 14.9 h | 14.3 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 am64°Fdew point 50°F
- 9 am76°Fdew point 49°F
- Noon84°Fdew point 45°F
- 3 pm85°Fdew point 44°F
- 6 pm79°Fdew point 47°F
- 9 pm70°Fdew point 50°F
NOAA hourly normals (local standard time) from Aurora Buckley Fld ANGB (16 mi away); average wind 8 mph; clear or few clouds in 42% of daytime hours, mostly cloudy or overcast in 33%.
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 in4 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 1.7 in; a dry July brings about 0.7 in and a wet one about 2.3 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How July varies from year to year
- Warmest July, 1991-20202003: average high 94°F
- Coolest July2009: average high 83°F
- Wettest July2014: 4.5 in
- Driest July2008: no measurable precipitation
- Highest reading104°F (July 21, 2005)
- Lowest reading44°F (July 4, 2006)
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 | 84°F | 90°F | 88°F |
| Normal low | 53°F | 59°F | 57°F |
| Wet days | 7 | 7 | 8 |
| Comfortable days | 10 | 3 | 5 |
| Daylight | 14.9 h | 14.7 h | 13.7 h |
Highs change by +6°F from June and -2°F into August.
Nearby alternatives in July
- Cooler: Highlands Ranch, CO22 mi · high 84°F · 9 wet days
How Thornton ranks in July
- Normal high138th warmest of 378 cities; 4th of 17 in Colorado
- Wet days139th driest of 378
- Comfortable days152nd most of 340
What to pack for Thornton in July
- Light, breathable clothing – highs near 90°F
- Layers – afternoons near 90°F but nights near 59°F
- Sunglasses and sunscreen – about 14.7 hours of daylight and highs near 90°F
Heating and cooling
July has 4 heating degree days and 306 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Thornton in July?
The normal high is 90°F and the normal low is 59°F. From 1991 to 2020 the hottest July reading was 104°F (July 21, 2005).
Does it rain a lot in Thornton in July?
About 7 days in July have at least 0.01 in of precipitation, and the normal total is 1.7 in. The wettest July in 1991-2020 was in 2014 (4.5 in); the driest was in 2008, with no measurable precipitation.
Is July a good time to visit Thornton?
July ranks 9th of 12 months on our comfort score for Thornton (49 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, snowfall and snow depth: Denver-Stapleton (USW00023062), 9.1 mi SE of the city center, 5,286 ft (61 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain and frost dates: Northglenn (USC00055984), 3.1 mi NW of the city center, 5,407 ft (60 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Aurora Buckley Fld ANGB (USW00023036), 16 mi SE of the city center, 5,663 ft (316 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Denver International Airport (725650-03017), 17 mi E of the city center, 5,404 ft (57 ft higher than the city). Hourly observations, 1991-2020.