Thornton, CO weather in April
In April, Thornton sees highs around 63°F and lows around 34°F: cool, with some rain and some snow. There are about 8 days with rain or snow. Snowfall averages about 6.2 in. Good for outdoor plans.
- Normal high
- 63°F
- Normal low
- 34°F
- Wet days
- 8
- 1.9 in total
- Snowfall
- 6.2 in
- snow on the ground 2 days
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 61°F | 65°F |
| Normal low | 31°F | 38°F |
| Chance of a wet day | 24% | 29% |
| Sunrise / sunset | 6:43 am / 7:23 pm | 6:01 am / 7:52 pm |
| Daylight | 12.7 h | 13.9 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 April day
- 6 am38°Fdew point 27°F
- 9 am49°Fdew point 27°F
- Noon56°Fdew point 25°F
- 3 pm58°Fdew point 25°F
- 6 pm53°Fdew point 28°F
- 9 pm45°Fdew point 29°F
NOAA hourly normals (local standard time) from Aurora Buckley Fld ANGB (16 mi away); average wind 10 mph; clear or few clouds in 27% of daytime hours, mostly cloudy or overcast in 58%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow8 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below12 of 30
- Snow on the groundsnow depth 1 in or more2 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 1.9 in; a dry April brings about 0.9 in and a wet one about 2.6 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 6.2 in, with about 2 days of an inch or more.
How April varies from year to year
- Warmest April, 1991-20201992: average high 69°F
- Coolest April1997: average high 54°F
- Wettest April1999: 6.5 in
- Driest April2002: 0.02 in
- Highest reading90°F (April 30, 1992)
- Lowest reading6°F (April 10, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 56°F | 63°F | 72°F |
| Normal low | 27°F | 34°F | 43°F |
| Wet days | 6 | 8 | 10 |
| Comfortable days | 9 | 13 | 15 |
| Daylight | 12.0 h | 13.3 h | 14.4 h |
Highs change by +7°F from March and +9°F into May.
Nearby alternatives in April
- Drier: Taos, NM241 mi · high 62°F · 5 wet days
- Cooler: Estes Park, CO46 mi · high 51°F · 10 wet days
How Thornton ranks in April
- Normal high243rd warmest of 378 cities; 6th of 17 in Colorado
- Wet days170th driest of 378
- Comfortable days136th most of 340
What to pack for Thornton in April
- A warm jacket – lows near 34°F, highs near 63°F
- Layers – afternoons near 63°F but nights near 34°F
- Waterproof boots – about 6.2 in of snow in a typical year
Heating and cooling
April has 508 heating degree days and 1 cooling degree days (base 65°F), 8% of the year's total heating and cooling demand.
Questions
How cold is Thornton in April?
The normal high is 63°F and the normal low is 34°F. From 1991 to 2020 the coldest April reading was 6°F (April 10, 2013).
Does it rain a lot in Thornton in April?
About 8 days in April have at least 0.01 in of precipitation, and the normal total is 1.9 in. The wettest April in 1991-2020 was in 1999 (6.5 in); the driest was in 2002 (0.02 in).
Does it snow in Thornton in April?
Yes. Normal snowfall in April is 6.2 in, and snow covers the ground on about 2 days.
Is April a good time to visit Thornton?
April ranks 2nd of 12 months on our comfort score for Thornton (68 out of 100). It has about 13 comfortable days. 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.