May 18, 2026 11:41 AM

Chance of Thunderstorm Today

HIGH DESERT, CA. (Pain In The Pass) >> High temperatures and monsoonal moisture are threatening this afternoon. There is a 10% to 20% chance of thunderstorms developing for the high desert and mountain area Sunday afternoon and a 30% chance for the Big Bear area.

So, this will make things hot and sticky across Southern California.

An excessive-heat warning remains in effect for much of the region’s inland communities between Las Vegas Neveda and San Bernardino County this weekend. The high desert cities are expected to exceed 105 degrees, with other inland valleys between 90 and 100.

If thunderstorms materialize, take the threat seriously and seek shelter inside. When thunder roars, go indoors! If not indoors in a vehicle.

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Cajon Pass
11:41 am, May 18, 2026
temperature icon 62°F
clear sky
Humidity: 18 %
Pressure: 1012 mb
Wind: 5 mph
Wind Gust: 13 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 5:45 am
Sunset: 7:46 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 pm
temperature icon
62°/63°°F 0 mm 0% 16 mph 15% 1012 mb 0 mm/h
5:00 pm
temperature icon
62°/63°°F 0 mm 0% 13 mph 11% 1011 mb 0 mm/h
8:00 pm
temperature icon
57°/57°°F 0 mm 0% 7 mph 13% 1012 mb 0 mm/h
11:00 pm
temperature icon
53°/53°°F 0 mm 0% 1 mph 22% 1014 mb 0 mm/h
2:00 am
temperature icon
52°/52°°F 0 mm 0% 4 mph 14% 1014 mb 0 mm/h
5:00 am
temperature icon
51°/51°°F 0 mm 0% 6 mph 12% 1014 mb 0 mm/h
8:00 am
temperature icon
62°/62°°F 0 mm 0% 6 mph 9% 1016 mb 0 mm/h
11:00 am
temperature icon
70°/70°°F 0 mm 0% 12 mph 10% 1016 mb 0 mm/h