Johnstown in September
7.5out of 10
Yes, a good time to go
Mild: highs around 22°C. Frequent rain: about 11 rainy days.
22°CAvg high
12°CAvg low
11Rainy days (99 mm)
12:15 hDaylight
07:02Sunrise · 19:18 Sunset
Why this score
- Mild: highs around 22°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±4.3 days)
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±4.3 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 | 1°C | -7°C | 96 mm | 14 | – | – | 3.2 |
| February | 3°C | -6°C | 88 mm | 13 | – | – | 3.7 |
| March | 8°C | -1°C | 113 mm | 14 | – | – | 4.5 |
| April | 15°C | 4°C | 120 mm | 15 | – | – | 5.8 |
| May | 20°C | 10°C | 127 mm | 16 | – | – | 6.4 |
| June | 24°C | 14°C | 122 mm | 14 | – | – | 7.0 |
| July | 26°C | 17°C | 105 mm | 14 | – | – | 7.1 |
| August | 25°C | 16°C | 89 mm | 12 | – | – | 7.4 |
| September | 22°C | 12°C | 99 mm | 11 | – | – | 7.5 |
| October | 16°C | 6°C | 93 mm | 11 | – | – | 6.5 |
| November | 9°C | 1°C | 89 mm | 11 | – | – | 5.4 |
| December | 3°C | -4°C | 98 mm | 13 | – | – | 3.8 |
Frequently asked questions
How hot is Johnstown in September?
Daytime highs average 22°C and nights about 12°C.
When is the best time to visit Johnstown?
The best months are September, August, July, June.