Sunset on Cucamonga Peak north of Rancho Cucamonga

Weather · May

Rancho Cucamonga weather in May

Average highs of 80°F, lows of 56°F and 0.30 in of rain, from 30 years of weather records.

May is Rancho Cucamonga’s 6th warmest month, with average highs of 80°F and lows of 56°F. That is 4° warmer than April, and 0° above the yearly average high.

Average high
80°F
Average low
56°F
Precipitation
0.30 in
Wet days
2
Sunrise · sunset
5:48 AM · 7:44 PM

May across the year

  1. 68°45°Jan
  2. 68°46°Feb
  3. 72°49°Mar
  4. 76°51°Apr
  5. 80°56°May
  6. 86°60°Jun
  7. 94°65°Jul
  8. 95°65°Aug
  9. 91°64°Sep
  10. 83°57°Oct
  11. 75°49°Nov
  12. 67°44°Dec

High and low Rain

What to wear in May

  • Warm days: shorts and T-shirts, with a light layer for cooler evenings.

May is good for

Around Rancho Cucamonga

Four Points Hotel (by Sheraton), Rancho Cucamonga
Four Points Hotel (by Sheraton)Jordan W. · CC BY-SA 3.0
Guasti Gardens plaza, Victoria Gardens, Rancho Cucamonga
Guasti Gardens plaza, Victoria GardensJordan W. · CC BY-SA 3.0
Foothill Crossing Commercial Center, Rancho Cucamonga
Foothill Crossing Commercial CenterJordan W. · CC BY-SA 3.0

See Rancho Cucamonga

A look around town before you go.

A recorded drive through Rancho Cucamonga video thumbnail

A DRIVE AROUND TOWN

A recorded drive through Rancho Cucamonga

A recorded drive through Rancho Cucamonga offers a street-level introduction to the city. This film is a dated journey, not live road conditions.

Watch on YouTube ↗
My vlog: Discovering a beautiful mountain road in Rancho Cucamonga😄👍 video thumbnail

THINGS TO DO · YOUTUBE SHORT

My vlog: Discovering a beautiful mountain road in Rancho Cucamonga😄👍

An activity Short shared by XiaomeiCheckIn.

Watch on YouTube ↗

May compared with the months around it

MonthHighLowRain
April76°F51°F0.80 in
May80°F56°F0.30 in
June86°F60°F0.00 in

Planning a trip? See the best time to visit Rancho Cucamonga and today’s forecast.

Questions

How hot does it get in Rancho Cucamonga in May?

Average highs are 80°F and average lows 56°F, for a daily mean of 68°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Rancho Cucamonga in May?

May averages 0.30 in of precipitation over about 2 days with at least 0.01 in. It is the 8th wettest month of the year.

What time is sunset in Rancho Cucamonga in May?

Around mid-May the sun rises about 5:48 AM and sets about 7:44 PM, for roughly 13.9 hours of daylight.

Is May a good time to visit Rancho Cucamonga?

Yes. May is one of the mildest months, with highs between 65°F and 85°F and little rain.

NOAA U.S. Climate Normals 1991–2020, Ontario Intl Ap station (3.5 mi from downtown). Sunrise and sunset are calculated for May 15 at the city’s coordinates.

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