Hot
Average highs reach 34°C, so days can feel very hot.
Weather Guide
Rancho Cucamonga, California, United States Average Monthly Weather
Weather score61Good annual avg
Best months: July, August, September
Across the year, average daytime temperatures are around 25°C, sunshine averages 8.9h per day, and rainfall totals about 401mm. Sea temperatures average 18°C across the year.
Annual weather
Annual averages
Temp
25°C
Rain
401mm
Annual total
Sun
8.9h
Sea
18°C
Weather score
61
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 1mm, which is relatively low for holiday planning.
Bright
Sunshine averages 11h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 20°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
July34°C average high
July is one of Rancho Cucamonga's warmest months, with daytime heat above the yearly average.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
July1mm average rain
July is one of Rancho Cucamonga's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July11 hours average sun
July is one of Rancho Cucamonga's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July20°C average sea
July 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
July87 weather score
July 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