Johnston in September
7.9out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Some rain: about 8 rainy days.
25°CAvg high
13°CAvg low
8Rainy days (89 mm)
12:16 hDaylight
07:01Sunrise · 19:17 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Some rain: about 8 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (2.9 days). 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 | -10°C | 29 mm | 6 | – | – | 4.2 |
| February | 2°C | -8°C | 37 mm | 7 | – | – | 4.3 |
| March | 10°C | -1°C | 66 mm | 9 | – | – | 5.6 |
| April | 17°C | 5°C | 110 mm | 11 | – | – | 6.6 |
| May | 23°C | 12°C | 140 mm | 14 | – | – | 7.0 |
| June | 28°C | 17°C | 127 mm | 12 | – | – | 7.3 |
| July | 29°C | 19°C | 96 mm | 10 | – | – | 7.6 |
| August | 28°C | 18°C | 99 mm | 9 | – | – | 7.8 |
| September | 25°C | 13°C | 89 mm | 8 | – | – | 7.9 |
| October | 18°C | 7°C | 72 mm | 8 | – | – | 7.3 |
| November | 9°C | 0°C | 53 mm | 7 | – | – | 5.9 |
| December | 2°C | -7°C | 41 mm | 6 | – | – | 4.5 |
Frequently asked questions
How hot is Johnston in September?
Daytime highs average 25°C and nights about 13°C.
When is the best time to visit Johnston?
The best months are September, August, July.