United States · 1991–2020 normal
Johnston in
September.
Typical September weather in Johnston: 24.8°C by day, 12.8°C at night, 86 mm of rain over 6.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high24.8°C
Typical low12.8°C
Rain86 mm
Wet days6.8
Comfort score 83 this month, the highest of the year. Daylight is calculated as 12 h 25 from latitude 41.67°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4862760
- NOAA station
- USC00132209 · DES MOINES WSFO-JOHNSTON
- Station distance
- 7.4 km from the place centre
- Coverage
- Strong coverage · 25 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.