Boulder, CO Hourly Forecast
Boulder temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 3 PM - around 86°
- Coolest hour: 5 AM - around 59°
- Highest rain chance: 9 PM (49%) - pack accordingly
- UV peak: 1 PM at index 9 - sun protection recommended
- Windiest: 7 PM at 13 mph
Boulder hourly weather - Wednesday, August 26
In Boulder, expect a high near 86°F (30°C) around 3 PM and a low of 61°F (16°C) near 10 PM; precipitation risk peaks at 49% around 9 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 8 AM | Sunny | 68° | 66° | 1% | 2 mph W | 42% | 1 | |
| 9 AM | Sunny | 73° | 70° | 1% | 4 mph E | 35% | 2 | |
| 10 AM | Sunny | 76° | 71° | 1% | 7 mph E | 34% | 4 | |
| 11 AM | Partly Cloudy | 77° | 72° | 2% | 8 mph ENE | 35% | 7 | |
| 12 PM | Cloudy | 79° | 74° | 8% | 7 mph E | 33% | 8 | |
| 1 PM | Thundery outbreaks in nearby | 82° | 77° | 6% | 8 mph E | 29% | 9 | |
| 2 PM | Thundery outbreaks in nearby | 85° | 78° | 3% | 11 mph E | 25% | 8 | |
| 3 PM | Thundery outbreaks in nearby | 86° | 78° | 8% | 11 mph ENE | 24% | 7 | |
| 4 PM | Sunny | 81° | 75° | 1% | 9 mph E | 30% | 4 | |
| 5 PM | Patchy rain nearby | 83° | 79° | 7% | 5 mph NE | 26% | 2 | |
| 6 PM | Sunny | 83° | 79° | 1% | 5 mph NE | 26% | 0 | |
| 7 PM | Cloudy | 75° | 68° | 8% | 13 mph NE | 44% | 0 | |
| 8 PM | Patchy rain nearby | 68° | 67° | 11% | 3 mph NW | 57% | 0 | |
| 9 PM | Light rain shower | 62° | 60° | 49% | 6 mph N | 75% | 0 | |
| 10 PM | Light rain shower | 61° | 59° | 29% | 6 mph NW | 78% | 0 | |
| 11 PM | Clear | 62° | 59° | 8% | 6 mph WNW | 75% | 0 |
Boulder hourly weather - Thursday, August 27
In Boulder, expect a high near 87°F (31°C) around 4 PM and a low of 56°F (14°C) near 8 PM; precipitation risk peaks at 64% around 8 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Light rain shower | 60° | 59° | 24% | 3 mph NW | 76% | 0 | |
| 1 AM | Clear | 60° | 59° | 9% | 3 mph WNW | 77% | 0 | |
| 2 AM | Patchy rain nearby | 60° | 58° | 15% | 5 mph WSW | 74% | 0 | |
| 3 AM | Patchy rain nearby | 60° | 58° | 19% | 4 mph W | 71% | 0 | |
| 4 AM | Partly Cloudy | 60° | 57° | 7% | 5 mph WSW | 67% | 0 | |
| 5 AM | Overcast | 59° | 56° | 14% | 5 mph W | 65% | 0 | |
| 6 AM | Cloudy | 60° | 56° | 11% | 6 mph WSW | 60% | 0 | |
| 7 AM | Sunny | 61° | 57° | 3% | 6 mph W | 56% | 0 | |
| 8 AM | Sunny | 68° | 66° | 1% | 1 mph WNW | 46% | 1 | |
| 9 AM | Sunny | 72° | 69° | 1% | 4 mph ENE | 41% | 2 | |
| 10 AM | Sunny | 74° | 70° | 1% | 5 mph E | 39% | 4 | |
| 11 AM | Sunny | 78° | 73° | 1% | 7 mph E | 34% | 7 | |
| 12 PM | Sunny | 81° | 75° | 1% | 8 mph E | 28% | 8 | |
| 1 PM | Sunny | 84° | 77° | 1% | 10 mph E | 25% | 9 | |
| 2 PM | Sunny | 86° | 78° | 1% | 12 mph E | 23% | 8 | |
| 3 PM | Sunny | 87° | 79° | 1% | 11 mph ESE | 21% | 6 | |
| 4 PM | Partly Cloudy | 87° | 80° | 2% | 9 mph E | 21% | 3 | |
| 5 PM | Sunny | 86° | 77° | 1% | 13 mph ESE | 21% | 2 | |
| 6 PM | Overcast | 84° | 76° | 8% | 12 mph ESE | 22% | 0 | |
| 7 PM | Light rain shower | 76° | 71° | 36% | 8 mph E | 35% | 0 | |
| 8 PM | Light rain shower | 56° | 54° | 64% | 8 mph NW | 96% | 0 | |
| 9 PM | Clear | 61° | 58° | 9% | 7 mph WSW | 77% | 0 | |
| 10 PM | Clear | 62° | 59° | 7% | 6 mph WSW | 72% | 0 | |
| 11 PM | Clear | 62° | 60° | 6% | 5 mph WSW | 69% | 0 |
Boulder hourly weather - Friday, August 28
In Boulder, expect a high near 92°F (33°C) around 1 PM and a low of 62°F (17°C) near 6 AM; precipitation risk peaks at 17% around 7 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 63° | 60° | 16% | 6 mph W | 65% | 0 | |
| 1 AM | Overcast | 63° | 60° | 14% | 6 mph WSW | 61% | 0 | |
| 2 AM | Overcast | 63° | 59° | 13% | 6 mph W | 58% | 0 | |
| 3 AM | Partly Cloudy | 63° | 58° | 6% | 7 mph W | 55% | 0 | |
| 4 AM | Overcast | 63° | 58° | 11% | 8 mph W | 53% | 0 | |
| 5 AM | Partly Cloudy | 63° | 58° | 5% | 7 mph W | 51% | 0 | |
| 6 AM | Clear | 62° | 57° | 2% | 7 mph W | 50% | 0 | |
| 7 AM | Sunny | 64° | 58° | 2% | 7 mph W | 50% | 5 | |
| 8 AM | Sunny | 71° | 68° | 1% | 4 mph WSW | 42% | 6 | |
| 9 AM | Sunny | 79° | 76° | 0% | 1 mph WSW | 28% | 7 | |
| 10 AM | Sunny | 85° | 82° | 0% | 1 mph NNW | 21% | 7 | |
| 11 AM | Partly Cloudy | 88° | 82° | 2% | 5 mph NW | 17% | 8 | |
| 12 PM | Partly Cloudy | 90° | 82° | 3% | 9 mph WNW | 15% | 8 | |
| 1 PM | Cloudy | 92° | 82° | 6% | 12 mph WNW | 15% | 7 | |
| 2 PM | Overcast | 88° | 80° | 8% | 11 mph NW | 17% | 7 | |
| 3 PM | Overcast | 91° | 83° | 9% | 9 mph NW | 16% | 7 | |
| 4 PM | Overcast | 90° | 82° | 9% | 9 mph SW | 16% | 7 | |
| 5 PM | Overcast | 88° | 84° | 9% | 3 mph W | 17% | 7 | |
| 6 PM | Cloudy | 86° | 80° | 7% | 7 mph WNW | 19% | 7 | |
| 7 PM | Patchy rain nearby | 79° | 76° | 17% | 3 mph S | 31% | 6 | |
| 8 PM | Partly Cloudy | 73° | 67° | 4% | 7 mph SW | 36% | 0 | |
| 9 PM | Patchy rain nearby | 70° | 64° | 11% | 9 mph WSW | 38% | 0 | |
| 10 PM | Cloudy | 70° | 64° | 6% | 8 mph WSW | 39% | 0 | |
| 11 PM | Overcast | 70° | 64° | 10% | 8 mph WSW | 38% | 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 59°F (15°C) around 5 AM up to 86°F (30°C) near 3 PM - about 3°F (2°C) above the typical August high of 83°F (28°C).
Precipitation is a real possibility: the chance of rain peaks at 49% around 9 PM. UV reaches 9 (1 PM) - sun protection recommended through midday.
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.