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The weather in Longmont in April is very cold with temperatures between 3°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Longmont during the month of April. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
You can expect a few days of snow in Longmont during April. It’s important to get out your snow boots and warm mittens to stay warm while you explore Longmont.
Our weather forecast can give you a great sense of what weather to expect in Longmont in April 2025.
If you’re planning to visit Longmont in the near future, we highly recommend that you review the 14 day weather forecast for Longmont before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / -4° | 2 | 20 | 8 | 21 mm | Awful | Longmont in January |
| February | 6° / -5° | 3 | 15 | 11 | 35 mm | Awful | Longmont in February |
| March | 12° / 0° | 3 | 21 | 7 | 56 mm | Bad | Longmont in March |
| April | 16° / 3° | 4 | 21 | 6 | 64 mm | Ok | Longmont in April |
| May | 21° / 7° | 7 | 22 | 2 | 103 mm | Bad | Longmont in May |
| June | 30° / 14° | 3 | 27 | 0 | 44 mm | Good | Longmont in June |
| July | 32° / 17° | 3 | 28 | 0 | 60 mm | Good | Longmont in July |
| August | 32° / 16° | 1 | 30 | 0 | 35 mm | Good | Longmont in August |
| September | 28° / 13° | 2 | 28 | 0 | 35 mm | Perfect | Longmont in September |
| October | 18° / 5° | 2 | 26 | 3 | 33 mm | Ok | Longmont in October |
| November | 12° / 0° | 2 | 23 | 5 | 23 mm | Bad | Longmont in November |
| December | 6° / -5° | 2 | 21 | 7 | 19 mm | Awful | Longmont in December |