Thornton, CO weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Thornton now
Loading the National Weather Service forecast…
Thornton weather by the hour
Thornton weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Thornton.
This week in Thornton
Sunrise, sunset and moon in Thornton
What is the weather usually like in Thornton?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 91°F average high
- Januarycoldest month · 19°F average low
- 14.5 inprecipitation per year · 368 mm
- 44.8 insnowfall per year · 114 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Thornton: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station NORTHGLENN, CO US (USC00055984), adjusted for the elevation of Thornton.
Thornton weather month by month
Sunrise and sunset in Thornton through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:17 AM | 5:00 PM | 9 h 43 min |
| February | 6:50 AM | 5:37 PM | 10 h 46 min |
| March | 7:09 AM | 7:07 PM | 11 h 58 min |
| April | 6:19 AM | 7:39 PM | 13 h 19 min |
| May | 5:42 AM | 8:09 PM | 14 h 26 min |
| June | 5:29 AM | 8:31 PM | 15 h 2 min |
| July | 5:42 AM | 8:29 PM | 14 h 46 min |
| August | 6:10 AM | 7:57 PM | 13 h 47 min |
| September | 6:39 AM | 7:09 PM | 12 h 30 min |
| October | 7:09 AM | 6:21 PM | 11 h 12 min |
| November | 6:43 AM | 4:45 PM | 10 h 1 min |
| December | 7:12 AM | 4:37 PM | 9 h 24 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Thornton?
Thornton has a cold semi-arid climate. The warmest month is July, with an average high of 91°F (33°C), and the coldest is January, with average lows of 19°F (-7°C).
It gets about 14.5 inches (368 mm) of precipitation a year. The wettest month is May and the driest is January. Snow is common: about 45 inches fall in an average year.
The best time to visit Thornton is June to September. At 5,351 ft of elevation, nights are cool even in summer. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Thornton
Weather in towns near Thornton
Questions about the weather in Thornton
What is the hottest month in Thornton?
July, with an average high of 91°F (33°C).
What is the coldest month in Thornton?
January, with an average low of 19°F (-7°C).
How much does it rain in Thornton?
About 14.5 inches (368 mm) a year; the wettest month is May.
Does it snow in Thornton?
Yes, about 45 inches of snow fall in an average year.
When is the best time to visit Thornton?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Thornton have?
Cold semi-arid (Köppen BSk).
What is the weather like in Thornton in November?
Highs average 56°F and lows 27°F, with about 0.7 inches of precipitation.
What time is sunrise in Thornton?
Around 6:43 AM in mid-November, and sunset around 4:45 PM. Today’s exact times are shown above.
Where does this Thornton weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Thornton.
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