Atherton in January
So, what's Atherton actually like in January? In a word: lovely. It's summer, and the days are averaging 27.5 degrees.
Daytime highs average 27.5 degrees, dropping to 20.4 degrees overnight. That's a 7-degree swing between day and night. That's solidly pleasant territory. Great for being outdoors.
At 27.5 degrees, January runs 2.7 degrees above Atherton's annual average of 24.8 degrees.
You're looking at 418mm of rain across 28 days in a typical January. That's serious rainfall.
Solar exposure averages 18.8 MJ/m2 per day in January, with UV levels in the very high range. You'll want SPF 50+ and a decent hat.
The Comfort Score is 5.6/10 for January. It's fine, but not the highlight of the calendar.
Packing tip: bring a mix of short and long sleeves, waterproof gear, and SPF 50+ sunscreen and a hat.
Scroll down for the detailed climate data, or explore what nearby cities are like in January.
January at a Glance
Temperature Range
Daily temperature range in January. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- T-shirts and shorts for daytime
- Proper rain gear for frequent showers
- Sunscreen (SPF 30+) and sunglasses for UV protection
Coming From Overseas?
How January in Atherton stacks up against major cities around the world.
About 20 degrees warmer and considerably wetter.
About 24 degrees warmer and considerably wetter.
About 18 degrees warmer and considerably wetter.
How January Compares
Atherton's monthly climate at a glance. January is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 27.5 | 20.4 | 418mm | 5.6 |
| Feb | 26.8 | 20.2 | 182mm | 5.8 |
| Mar | 25.8 | 19.7 | 245mm | 6.3 |
| Apr | 24.2 | 17.6 | 76mm | 8.8 |
| May | 21.8 | 16.1 | 36mm | 7.3 |
| Jun | 22.5 | 12.7 | 11mm | 9.5 |
| Jul | 20.3 | 12.2 | 14mm | 7.5 |
| Aug | 22.3 | 13.3 | 14mm | 9.3 |
| Sep | 23.3 | 14.9 | 43mm | 9.7 |
| Oct | 26.6 | 16.1 | 10mm | 9.5 |
| Nov | 28.1 | 17.2 | 61mm | 8.0 |
| Dec | 28.2 | 19.5 | 382mm | 5.8 |