Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Rancho Cucamonga, California, United States in September
Weather score82Very good
Very good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 9.4h 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
31°C
Rain
9mm
Sun
9.4h
Sea
21°C
Weather score
82
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 9mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.4h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Rancho Cucamonga, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
September9mm average rain
September sits on the drier side of Rancho Cucamonga's year, which helps with sightseeing and transfers.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September9.4 hours average sun
September sits close to Rancho Cucamonga's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September21°C average sea
September is one of Rancho Cucamonga's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
September82 weather score
September is one of Rancho Cucamonga's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
Hotels in Rancho Cucamonga, California, United States
Marriott
Aloft Ontario-Rancho CucamongaRancho Cucamonga, California, USA
Courtyard Ontario Rancho CucamongaRancho Cucamonga, California, USA
Fairfield Inn & Suites Ontario Rancho CucamongaRancho Cucamonga, California, USA
Four Points by Sheraton Ontario-Rancho CucamongaRancho Cucamonga, California, USA
City Express By Marriott Rancho CucamongaRancho Cucamonga, California, USA
Residence Inn Ontario Rancho CucamongaRancho Cucamonga, California, USA