Average temperature in April is 7.5 °C
Average daytime temperature is 17 °C
Average night temperature is 0.1 °C
Absolute maximum temperature: 28 °C
Absolute minimum temperature: -8.7 °C
Number of sunny days: 17
Number of rainy days: 8
Number of snow days: 5
Precipitation sum: 49 mm
* Weather data for Longmont United States is based on climate observations for 2023 year
| April (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 16.7 | 18 | 15.8 | 10.5 | 4.9 | 9 | 17.1 | 18.8 | 19.6 | 22.7 | 28 | 27.5 | 24.9 | 21.3 | 10.8 | 15.8 | 21.4 | 23.5 | 20.2 | 8.9 | 9.8 | 5.8 | 12.9 | 17.7 | 15.1 | 14.2 | 20 | 15.3 | 21.9 | 21.4 |
| Apparent max temperature | 12.3 | 14.8 | 11.9 | 5.3 | 1.8 | 5.9 | 14.7 | 15.8 | 17.9 | 20.8 | 26.3 | 26.3 | 20.7 | 16 | 7.1 | 13.3 | 19.4 | 19.2 | 13.5 | 3.5 | 7 | 1.9 | 11 | 17 | 11.5 | 12.7 | 16.9 | 12.2 | 20.2 | 18.2 |
| Mean temperature | 6.3 | 9.3 | 7.2 | 1.1 | -2.7 | -0.6 | 3.7 | 8.4 | 9.2 | 10.2 | 14.4 | 15.7 | 16.6 | 8.5 | 3.3 | 4.7 | 9.8 | 12 | 10.1 | 3.2 | 3.4 | 1.2 | 3.7 | 8.1 | 8.9 | 7.5 | 10.8 | 7.6 | 11.9 | 13 |
| Apparent mean temperature | -5.3 | -3 | -3.4 | -8.1 | -12.3 | -13.3 | -10.5 | -4.5 | -4.2 | -4 | -0.2 | 2.1 | 5.1 | -0.7 | -4.5 | -7.2 | -3.8 | -1.9 | -1.1 | -6.8 | -7.2 | -6.5 | -6.5 | -3.1 | 1.4 | 1.7 | -1.2 | -1.5 | 0.2 | 2.5 |
| Minimum temperature | -1.3 | 1.2 | -0.2 | -3.4 | -8.4 | -8.7 | -6.1 | -0.9 | -0.4 | -0.5 | 3.1 | 5.6 | 8.1 | 2.8 | -1.3 | -3.3 | -0.3 | 1.4 | 3.7 | -2.8 | -2.5 | -2.7 | -2.6 | 0.3 | 4.2 | 4.1 | 2.1 | 2.2 | 4 | 5.8 |
| Apparent min temperature | 2.2 | 4.9 | 3.6 | -4.5 | -6.7 | -4.6 | 0 | 4.7 | 6.3 | 7.2 | 11.3 | 12.5 | 12.6 | 4.4 | 0.2 | 1.3 | 6.7 | 8.2 | 5.7 | -1.2 | -1 | -2.5 | 0.5 | 5.2 | 6 | 5 | 7.8 | 3.8 | 9 | 10.5 |
| April | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.9 | 12.9 | 13 | 13 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.5 | 13.5 | 13.6 | 13.6 | 13.6 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.9 |
| Sunshine duration (h) | 10.9 | 11.8 | 11.9 | 3.3 | 9.9 | 10.5 | 12 | 11.1 | 10.2 | 12 | 12 | 12 | 8 | 2 | 10 | 12.1 | 12.1 | 12 | 12 | 11.4 | 12.2 | 4.6 | 10.2 | 12.1 | 10.3 | 9 | 12.2 | 11.4 | 12.4 | 12.6 |
| Precipitation (mm) | 0 | 0 | 0 | 4.1 | 0.5 | 0.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.8 | 4.3 | 0 | 0 | 0 | 1.6 | 5.8 | 0 | 4.9 | 0.3 | 0 | 1.2 | 15.9 | 0.1 | 4.1 | 0 | 0 |
| Precipitation hours | 0 | 0 | 0 | 13 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 10 | 0 | 0 | 0 | 2 | 4 | 0 | 14 | 3 | 0 | 7 | 20 | 1 | 5 | 0 | 0 |
| Wind speed (m/s) | 18.9 | 21.5 | 15.1 | 30.6 | 17.3 | 10.8 | 10.2 | 11 | 9.5 | 14.1 | 17.9 | 14.1 | 22.8 | 24.6 | 18 | 9.8 | 9.8 | 26.8 | 29.5 | 25.6 | 20.1 | 11.3 | 10.6 | 11.3 | 18.8 | 21.1 | 20.5 | 35 | 12.6 | 11.5 |
In April 2023, the highest daytime temperature in Longmont was 28°C.
While the minimum temperature at night dropped to -8.7°C.
The average nighttime and daytime temperatures during April in Longmont are 0.1°C and 17°C respectively.
The precipitation sum in April is about 49 mm.