Heat stress in Moreno Valley
Dry Inland Empire heat piles up long, hot, high-sun afternoons that run well above the coast.
Light precautions for intense activity. Keep water handy.
Wet-bulb globe temperature via the Liljegren (2008) method. This page is cached and refreshes in the background, so the live badge below can be a few minutes ahead of it.
View Moreno Valley on the live mapReading heat stress in Moreno Valley
Wet-bulb globe temperature (WBGT) is the heat measure that actually tracks danger to the body. Unlike the plain air temperature on your phone, it folds in humidity, wind, and direct sun: the factors that decide whether your sweat can still cool you. It’s the standard the military, athletic associations, and occupational-safety bodies use to call when outdoor activity is no longer safe.
That matters in Moreno Valley because dry Inland Empire heat piles up long, hot, high-sun afternoons that run well above the coast. The number above is the live outdoor WBGT for the city right now; tap through to the live map to inspect any neighborhood, scrub the forecast hour by hour, and see the 7-day outlook.
How hot Moreno Valley usually gets
Across 2015–2024, Moreno Valley averaged a 91°F daily high in summer: 45th hottest of the 174 metros we track, and August is typically the warmest month.
Most of the heat here sits below the extremes: around 81 days a year top 90°F, and only about 13 reach 100°F.
At about 48% summer humidity, the air is damp enough to blunt how well sweat cools you on the worst afternoons.
The ceiling is a long way above the routine: the hottest day in this sample hit 112°F, about 21°F past a normal summer afternoon.
Daily high temperatures and humidity from ERA5 reanalysis, 2015–2024 (hottest day in the sample: 2018-07-06). These are climate averages for context: the reading at the top of this page is the live one.
Heat in Moreno Valley: common questions
How hot does it usually get in Moreno Valley?
Across 2015–2024, Moreno Valley averaged a 91°F daily high through summer, with about 81 days a year at or above 90°F and 13 at or above 100°F. August is typically the hottest month, and the hottest day in that sample reached 112°F. Figures are from ERA5 daily reanalysis.
When is the hottest time of year in Moreno Valley?
August has the highest average daily high in Moreno Valley. Summer humidity averages about 48%, enough to blunt how well sweat cools you on the hottest afternoons. Use the forecast on this page to plan around the specific days that matter.
What is the WBGT in Moreno Valley right now?
The reading at the top of this page is the current wet-bulb globe temperature for Moreno Valley, California, computed from live weather by the Liljegren (2008) method and labeled with how recently it updated. For an exact reading at your own neighborhood, plus an hour-by-hour forecast, open the live map.
Why is WBGT more useful than the temperature for Moreno Valley?
Air temperature ignores humidity, wind, and sun: the things that decide whether heat is dangerous. Moreno Valley's climate (dry Inland Empire heat piles up long, hot, high-sun afternoons that run well above the coast.) is exactly why a single "feels-like" or thermometer reading can understate the real risk. WBGT captures all of it in one number.
When is heat most dangerous in Moreno Valley?
August is the peak month in Moreno Valley, and within a day heat stress is highest in the early-to-mid afternoon when sun load is greatest. About 81 days a year reach 90°F, so most of the risk sits in a handful of afternoons rather than across the whole season. Use the forecast on this page to find the window that works.
Put Moreno Valley’s live heat stress on your site
A self-updating WBGT badge for schools, teams, camps, and local sites: it always shows the current reading and links back here.
<iframe src="https://wetbulbtracker.com/embed/moreno-valley-ca" width="340" height="150" style="border:0" title="Live WBGT: Moreno Valley, CA" loading="lazy"></iframe>Paste it into any website. The badge updates itself and links back here. Add ?theme=light for light sites.