Boulder, CO weather in April
Boulder is cool and snowy in April: highs average 63°F and nights drop to about 35°F. Expect about 10 wet days. Snowfall averages about 14.7 in. Expect snow on the ground at times.
- Normal high
- 63°F
- Normal low
- 35°F
- Wet days
- 10
- 3.0 in total
- Snowfall
- 14.7 in
- snow on the ground 3 days
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 61°F | 66°F |
| Normal low | 32°F | 38°F |
| Chance of a wet day | 31% | 36% |
| Sunrise / sunset | 6:44 am / 7:24 pm | 6:02 am / 7:54 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 28°F
- Noon56°Fdew point 25°F
- 3 pm59°Fdew point 25°F
- 6 pm54°Fdew point 27°F
- 9 pm45°Fdew point 29°F
NOAA hourly normals (local standard time) from Denver Intl Airport (35 mi away); average wind 12 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°F14 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 snow10 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below11 of 30
- Snow on the groundsnow depth 1 in or more3 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 3.0 in; a dry April brings about 1.6 in and a wet one about 4.1 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 14.7 in, with about 3 days of an inch or more.
How April varies from year to year
- Warmest April, 1991-20202006: average high 70°F
- Coolest April1997: average high 56°F
- Wettest April1999: 7.5 in
- Driest April2002: 0.2 in
- Highest reading87°F (April 24, 2012)
- Lowest reading2°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 | 57°F | 63°F | 71°F |
| Normal low | 29°F | 35°F | 43°F |
| Wet days | 8 | 10 | 13 |
| Comfortable days | 9 | 14 | 18 |
| Daylight | 12.0 h | 13.3 h | 14.4 h |
Highs change by +6°F from March and +8°F into May.
Nearby alternatives in April
- Warmer: Moab, UT250 mi · high 72°F · 5 wet days
- Drier: Pueblo, CO127 mi · high 67°F · 7 wet days
- Cooler: Estes Park, CO28 mi · high 51°F · 10 wet days
How Boulder ranks in April
- Normal high239th warmest of 378 cities; 3rd of 17 in Colorado
- Wet days229th driest of 378
- Comfortable days102nd most of 340
What to pack for Boulder in April
- A warm jacket – lows near 35°F, highs near 63°F
- Layers – afternoons near 63°F but nights near 35°F
- A rain jacket or umbrella – rain or snow on about 10 days
- Waterproof boots – about 14.7 in of snow in a typical year
Heating and cooling
April has 491 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 Boulder in April?
The normal high is 63°F and the normal low is 35°F. From 1991 to 2020 the coldest April reading was 2°F (most recently on April 10, 2013).
Does it rain a lot in Boulder in April?
About 10 days in April have at least 0.01 in of precipitation, and the normal total is 3.1 in. The wettest April in 1991-2020 was in 1999 (7.6 in); the driest was in 2002 (0.2 in).
Does it snow in Boulder in April?
Yes. Normal snowfall in April is 14.7 in, and snow covers the ground on about 3 days.
Is April a good time to visit Boulder?
April ranks 2nd of 12 months on our comfort score for Boulder (69 out of 100). It has about 14 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Boulder (USC00050848), 1.6 mi S of the city center, 5,484 ft (165 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Denver Intl Airport (USW00003017), 35 mi ESE of the city center, 5,414 ft (95 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Aurora Buckley Fld ANGB (USW00023036), 35 mi SE of the city center, 5,663 ft (344 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Denver International Airport (725650-03017), 35 mi ESE of the city center, 5,404 ft (85 ft higher than the city). Hourly observations, 1991-2020.