Johnston in May
7.0out of 10
Possible, with caveats
Warm and comfortable: highs around 23°C. Frequent rain: about 14 rainy days.
23°CAvg high
12°CAvg low
14Rainy days (140 mm)
14:21 hDaylight
06:01Sunrise · 20:22 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Frequent rain: about 14 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?
Rain in May varies a lot between years (±3.3 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 | -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 May?
Daytime highs average 23°C and nights about 12°C.
When is the best time to visit Johnston?
The best months are September, August, July.