County in California

Riverside County Vær Værmelding

Riverside County weather: 21°C, klarvær. Time for time forecast, 14-day outlook, UV, air quality and the best time til visit.

🌙 21°C now🕔 1:35 AM local📅 Best: april, mai, juni, juli, august, september and oktober👥 2.5 million

Riverside County weather in september

33°
average high · low 19°C
★★★★★
ranked #5 of 12 months

One of the best months til visit Riverside County.

Average high33°C
Average low19°C
Mean24°C
Regnfall25 mm

september runs 5°C warmer than the annual average in Riverside County.

Compare med august.

Vær map for Riverside County

Animated model layers. Pick a layer til load it.

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Animated layers by Vindy. For pin-level detail and nearby places, see the interactive map below.

Klima in Riverside County month by month

Average high, average low and total rainfall, based on three years of reanalysis data.

janfebmaraprmaijunjulaugsepoktnovdesLine: average high · Bars: rainfall
MånedAvg highAvg lowRegnfallRating
januar19°7°45 mm★★★★☆
februar20°9°115 mm★★★☆☆
mars23°10°59 mm★★★★☆
april24°11°20 mm★★★★★
mai27°13°5 mm★★★★★
juni32°16°0 mm★★★★★
juli35°19°3 mm★★★★★
august36°20°1 mm★★★★★
september33°19°25 mm★★★★★
oktober29°14°14 mm★★★★★
november23°10°55 mm★★★★☆
desember21°8°39 mm★★★★☆

Klima type: Mediterranean. Kilde: Open-Meteo archive (ERA5).

Beste tid å besøke Riverside County

Go in april, mai, juni, juli, august, september and oktober. These months score highest on comfortable temperatures, low rainfall and useful daylight.

Hardest months: januar, februar and desember - expect the least comfortable mix of heat, cold or rain.

januar★★★★☆
februar★★★☆☆
mars★★★★☆
april★★★★★
mai★★★★★
juni★★★★★
juli★★★★★
august★★★★★
september★★★★★
oktober★★★★★
november★★★★☆
desember★★★★☆

What til pack, what til skip

Pack for the next 7 days
  • Lightweight, light-coloured clothing and a refillable water bottle
  • sønglasses, a brimmed hat and SPF 30+
Worth avoiding
  • Avoid long hikes after mid-morning; start at dawn or leave it for a cooler day.
  • If your dates are flexible, avoid januar, februar and desember - historically the least comfortable months here.

How Riverside County compares med nearby places

Annual averages, and the difference against Riverside County.

PlaceDistanceAvg tempvs hereAnnual rain
Orange County48 km18°C1°C cooler385 mm
Disneyland Resort51 km18°C1°C cooler483 mm
ZIP Code 9000179 km18°C1°C cooler465 mm
Los Angeles County79 km18°C1°C cooler529 mm
Los Angeles79 km18°C1°C cooler529 mm

Se prognosen for Riverside County etter tidsintervall

Riverside County weather - more answers

Explore Riverside County

Every topic we hold for this place, and the same topic for the places around it.

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Frequently asked questions

Where is Riverside County?

Riverside County is a county in California. Its coordinates are 33.9533, -117.3961. It lies in Nord-Amerika.

What is the weather like in Riverside County akkurat nå?

It is currently 21°C (69°F) med klarvær. Luftfuktighet is 56% and wind is 5 km/h.

When is the best time til visit Riverside County?

april, mai, juni, juli, august, september and oktober offer the most comfortable conditions in Riverside County, which has a Mediterranean climate. januar, februar and desember are usually the hardest months for outdoor plans.

What time zone is Riverside County in?

Riverside County observes America/Los_Angeles (UTC-07:00). The local time is 1:35 AM.

How many people live in Riverside County?

Riverside County has a population of approximately 2.5 million.

What is the nearest airport til Riverside County?

The closest airports are Los Angeles International Airport (LAX), 93 km away, San Diego International Airport (SAN), 137 km away and Harry Reid International Airport (LAS), 313 km away.

What are the top things til do in Riverside County?

Popular options include Disneyland Resort, Hollywood Sign, Santa manica State Beach, Anza-Borrego Desert State Park, Joshua Tree National Park and Coronado Beach.

Related articles

Data sources and methodology

Place dataUSPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts.
Værmelding and observationsOpen-Meteo (ECMWF and national models).
Luftkvalitet and pollenCopernicus CAMS via Open-Meteo. US AQI scale.
Klima averagesERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years.
Official alertsUS National Vær Service.
MethodScores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown.

Last updated oktober 1, 2026 at 1:35 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.

Davil Hofile
Written byWriter at USPOTUS

Davil Hofile is a writer at USPOTUS covering breaking news, NFL updates, viral stories, entertainment, pets, and lifestyle. He specializes in transforming complex news into clear, trustworthy, and engaging articles that help readers quickly understand what's happening across the United States. His reporting follows Google's E-E-A-T guidelines, emphasizing accuracy, credible sources, and practical value for readers.

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