Boulder, CO Hourly Forecast
Boulder temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 2 PM - around 75°
- Coolest hour: 3 AM - around 54°
- Rain risk: low all day (peaks at 18%)
- UV peak: 3 PM at index 5 - sun protection recommended
- Windiest: 4 PM at 10 mph
Boulder hourly weather - Tuesday, September 15
In Boulder, expect a high near 75°F (24°C) around 5 PM and a low of 59°F (15°C) near 11 PM; precipitation risk peaks at 15% around 11 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 3 PM | Cloudy | 71° | 64° | 5% | 9 mph ESE | 29% | 5 | |
| 4 PM | Partly Cloudy | 74° | 66° | 2% | 10 mph SE | 29% | 3 | |
| 5 PM | Patchy rain nearby | 75° | 69° | 9% | 7 mph ESE | 30% | 2 | |
| 6 PM | Sunny | 74° | 70° | 1% | 5 mph ESE | 31% | 0 | |
| 7 PM | Sunny | 65° | 63° | 2% | 1 mph SSE | 48% | 0 | |
| 8 PM | Patchy rain nearby | 61° | 58° | 10% | 3 mph W | 57% | 0 | |
| 9 PM | Clear | 60° | 54° | 4% | 8 mph NW | 60% | 0 | |
| 10 PM | Cloudy | 59° | 54° | 13% | 7 mph NW | 61% | 0 | |
| 11 PM | Overcast | 59° | 54° | 15% | 8 mph NW | 62% | 0 |
Boulder hourly weather - Wednesday, September 16
In Boulder, expect a high near 77°F (25°C) around 3 PM and a low of 54°F (12°C) near 3 AM; precipitation risk peaks at 18% around 1 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 57° | 52° | 17% | 6 mph N | 66% | 0 | |
| 1 AM | Overcast | 55° | 51° | 18% | 7 mph NNW | 69% | 0 | |
| 2 AM | Overcast | 56° | 52° | 16% | 5 mph N | 65% | 0 | |
| 3 AM | Overcast | 54° | 52° | 18% | 4 mph NW | 68% | 0 | |
| 4 AM | Overcast | 55° | 53° | 16% | 3 mph W | 65% | 0 | |
| 5 AM | Overcast | 58° | 55° | 15% | 2 mph SW | 60% | 0 | |
| 6 AM | Overcast | 58° | 56° | 14% | 1 mph SSW | 59% | 0 | |
| 7 AM | Overcast | 59° | 57° | 14% | 0 mph S | 59% | 0 | |
| 8 AM | Overcast | 62° | 59° | 13% | 2 mph SSE | 53% | 0 | |
| 9 AM | Overcast | 65° | 62° | 11% | 4 mph SE | 48% | 1 | |
| 10 AM | Overcast | 67° | 64° | 11% | 4 mph E | 45% | 2 | |
| 11 AM | Overcast | 70° | 66° | 10% | 4 mph E | 42% | 3 | |
| 12 PM | Overcast | 72° | 68° | 10% | 5 mph E | 39% | 4 | |
| 1 PM | Overcast | 74° | 70° | 10% | 6 mph E | 36% | 5 | |
| 2 PM | Overcast | 75° | 72° | 10% | 4 mph E | 34% | 4 | |
| 3 PM | Overcast | 77° | 74° | 10% | 3 mph ESE | 32% | 3 | |
| 4 PM | Patchy rain nearby | 77° | 73° | 10% | 4 mph SSE | 32% | 2 | |
| 5 PM | Overcast | 77° | 74° | 9% | 3 mph E | 32% | 1 | |
| 6 PM | Overcast | 75° | 73° | 10% | 3 mph NNE | 38% | 0 | |
| 7 PM | Overcast | 69° | 66° | 11% | 3 mph NW | 45% | 0 | |
| 8 PM | Overcast | 67° | 62° | 12% | 8 mph W | 49% | 0 | |
| 9 PM | Overcast | 66° | 62° | 12% | 7 mph W | 50% | 0 | |
| 10 PM | Overcast | 68° | 62° | 11% | 8 mph WSW | 47% | 0 | |
| 11 PM | Overcast | 68° | 63° | 11% | 6 mph WSW | 47% | 0 |
Boulder hourly weather - Thursday, September 17
In Boulder, expect a high near 76°F (24°C) around 2 PM and a low of 61°F (16°C) near 8 PM; precipitation risk peaks at 17% around 3 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 68° | 64° | 11% | 6 mph WSW | 46% | 0 | |
| 1 AM | Overcast | 69° | 64° | 10% | 6 mph WNW | 41% | 0 | |
| 2 AM | Overcast | 68° | 65° | 10% | 3 mph SSW | 41% | 0 | |
| 3 AM | Patchy rain nearby | 67° | 64° | 17% | 4 mph W | 44% | 0 | |
| 4 AM | Patchy rain nearby | 65° | 61° | 13% | 5 mph WNW | 50% | 0 | |
| 5 AM | Overcast | 64° | 60° | 12% | 5 mph W | 51% | 0 | |
| 6 AM | Overcast | 65° | 62° | 12% | 4 mph WSW | 52% | 0 | |
| 7 AM | Overcast | 62° | 60° | 14% | 3 mph W | 58% | 0 | |
| 8 AM | Overcast | 66° | 64° | 12% | 3 mph W | 53% | 0 | |
| 9 AM | Overcast | 68° | 67° | 11% | 2 mph N | 45% | 1 | |
| 10 AM | Overcast | 70° | 67° | 10% | 3 mph NNE | 43% | 2 | |
| 11 AM | Patchy rain nearby | 70° | 67° | 11% | 4 mph NNE | 44% | 2 | |
| 12 PM | Patchy rain nearby | 71° | 69° | 11% | 3 mph ENE | 42% | 3 | |
| 1 PM | Overcast | 73° | 70° | 10% | 4 mph ENE | 40% | 5 | |
| 2 PM | Patchy rain nearby | 76° | 72° | 10% | 6 mph ENE | 37% | 6 | |
| 3 PM | Overcast | 74° | 72° | 10% | 2 mph ESE | 38% | 2 | |
| 4 PM | Patchy rain nearby | 74° | 70° | 10% | 5 mph NNW | 39% | 1 | |
| 5 PM | Patchy rain nearby | 69° | 68° | 17% | 3 mph W | 51% | 0 | |
| 6 PM | Overcast | 68° | 66° | 13% | 3 mph SW | 55% | 0 | |
| 7 PM | Partly Cloudy | 64° | 64° | 9% | 2 mph SW | 64% | 0 | |
| 8 PM | Overcast | 61° | 60° | 17% | 4 mph W | 68% | 0 | |
| 9 PM | Overcast | 63° | 61° | 16% | 4 mph W | 64% | 0 | |
| 10 PM | Overcast | 63° | 60° | 16% | 4 mph WSW | 64% | 0 | |
| 11 PM | Overcast | 62° | 60° | 16% | 4 mph WSW | 64% | 0 |
Quick answers for the hours ahead
What is the warmest hour in Boulder today?
Will it rain in Boulder tonight?
When is the UV index highest in Boulder today?
Boulder hour-by-hour: what to expect
Over the next 24 hours in Boulder, temperatures range from 54°F (12°C) around 3 AM up to 75°F (24°C) near 2 PM - about 3°F (2°C) below the typical September high of 78°F (26°C).
A stray shower can't be ruled out - Rain chances top out at 18% around 1 AM.
The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the Boulder 14-day forecast or the monthly climate averages.