Warm
Average highs sit around 26°C, giving warm days by monthly-average standards.
September verdict
Kennewick, Washington, United States in September
Weather score72Very good
Very good for holiday weather
Average highs sit around 26°C, giving warm days by monthly-average standards. Sunshine averages 8.6h per day, so bright days are a strong part of the month. Rainfall averages 9mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
26°C
Rain
9mm
Sun
8.6h
Weather score
72
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 9mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.6h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Kennewick, Washington, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September26°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September9mm average rain
September is close to Kennewick's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September8.6 hours average sun
September is brighter than Kennewick's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September72 weather score
September sits close to Kennewick's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
