Keystone in August
5.3out of 10
Not the best time
Hot: daytime highs around 32°C. Very wet: about 20 rainy days.
32°CAvg high
24°CAvg low
20Rainy days (144 mm)
13:00 hDaylight
07:04Sunrise · 20:05 Sunset
Why this score
- Hot: daytime highs around 32°C
- Very wet: about 20 rainy days
- Rain varies a lot between years (±4.5 days)
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in August varies a lot between years (±4.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 21°C | 11°C | 63 mm | 7 | – | – | 8.1 |
| February | 22°C | 12°C | 56 mm | 6 | – | – | 8.2 |
| March | 25°C | 14°C | 64 mm | 6 | – | – | 8.2 |
| April | 28°C | 17°C | 54 mm | 6 | – | – | 8.2 |
| May | 31°C | 20°C | 59 mm | 8 | – | – | 7.7 |
| June | 32°C | 23°C | 127 mm | 16 | – | – | 6.0 |
| July | 32°C | 24°C | 127 mm | 19 | – | – | 5.6 |
| August | 32°C | 24°C | 144 mm | 20 | – | – | 5.3 |
| September | 31°C | 23°C | 117 mm | 15 | – | – | 6.3 |
| October | 29°C | 19°C | 53 mm | 7 | – | – | 8.1 |
| November | 25°C | 15°C | 36 mm | 5 | – | – | 8.5 |
| December | 22°C | 12°C | 56 mm | 6 | – | – | 8.3 |
Frequently asked questions
How hot is Keystone in August?
Daytime highs average 32°C and nights about 24°C.
When is the best time to visit Keystone?
The best months are November, December, February, March.