Thornton, CO weather in June
Expect warm weather with some rain in Thornton in June, with highs near 84°F and lows near 53°F. Rain falls on about 7 days. Good for outdoor plans.
- Normal high
- 84°F
- Normal low
- 53°F
- Wet days
- 7
- 1.5 in total
- Muggy days
- 0
- dew point 65°F+
How June changes from start to finish
| June 1 | June 30 | |
|---|---|---|
| Normal high | 79°F | 89°F |
| Normal low | 49°F | 57°F |
| Chance of a wet day | 28% | 22% |
| Sunrise / sunset | 5:33 am / 8:22 pm | 5:34 am / 8:32 pm |
| Daylight | 14.8 h | 15.0 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 June day
- 6 am58°Fdew point 45°F
- 9 am70°Fdew point 44°F
- Noon78°Fdew point 40°F
- 3 pm79°Fdew point 41°F
- 6 pm74°Fdew point 43°F
- 9 pm65°Fdew point 45°F
NOAA hourly normals (local standard time) from Aurora Buckley Fld ANGB (16 mi away); average wind 9 mph; clear or few clouds in 37% of daytime hours, mostly cloudy or overcast in 42%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 30
- Hot dayshigh 90°F or more8 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per June, counted from daily records for each year 1991-2020.
Rain in June
Normal precipitation is 1.5 in; a dry June brings about 0.8 in and a wet one about 2.4 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How June varies from year to year
- Warmest June, 1991-20202018: average high 91°F
- Coolest June1995: average high 75°F
- Wettest June2009: 3.4 in
- Driest June2012: 0.1 in
- Highest reading104°F (June 29, 2018)
- Lowest reading36°F (June 5, 1998)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
June compared with May and July
| May | June | July | |
|---|---|---|---|
| Normal high | 72°F | 84°F | 90°F |
| Normal low | 43°F | 53°F | 59°F |
| Wet days | 10 | 7 | 7 |
| Comfortable days | 15 | 10 | 3 |
| Daylight | 14.4 h | 14.9 h | 14.7 h |
Highs change by +12°F from May and +6°F into July.
Nearby alternatives in June
- Drier: Taos, NM241 mi · high 80°F · 4 wet days
- Cooler: Highlands Ranch, CO22 mi · high 79°F · 8 wet days
How Thornton ranks in June
- Normal high178th warmest of 378 cities; 4th of 17 in Colorado
- Wet days112th driest of 378
- Comfortable days129th most of 340
What to pack for Thornton in June
- Layers – afternoons near 84°F but nights near 53°F
- Sunglasses and sunscreen – about 15.0 hours of daylight and highs near 84°F
Heating and cooling
June has 46 heating degree days and 151 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Thornton in June?
The normal high is 84°F and the normal low is 53°F. From 1991 to 2020 the hottest June reading was 104°F (most recently on June 29, 2018).
Does it rain a lot in Thornton in June?
About 7 days in June have at least 0.01 in of precipitation, and the normal total is 1.5 in. The wettest June in 1991-2020 was in 2009 (3.4 in); the driest was in 2012 (0.1 in).
Is June a good time to visit Thornton?
June ranks 4th of 12 months on our comfort score for Thornton (64 out of 100). It has about 10 comfortable days and about 8 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.