July 2013 Wrap-Up - Belmont, CA

By: BelmontJeff , 3:07 AM GMT on August 02, 2013

Temperature: The first 4 days of July recorded Max. Temps. >80°, followed by only 1 more occurrence the 5th-22nd. The month's highest Temp. of 89.7° occurred on the 3rd; it is fairly unusual not to reach 90 degrees in July. The month's coolest Max. Temp. of 64.1° waited until the 28th and was held down by that day's strong, steady onshore coastal wind under sunny skies. The Average Max. Temp. was 74.0°, 1.3° below June's 75.3° average.

Except for the month's warmest Min. Temp. of 60.5° on the 4th, the Min. Temps. showed a fairly steady decline through the 21st (this 60.5° was the month's only Min. ≥60°; in fact, 25 of the 31 days reached Mins. ≤55°). July's Average Min. Temp. was 54.1°, 0.2° cooler than June's Average of 54.3°. This month's Mean Temp. of 64.1° was 0.7° cooler than the Average in June.

No Cooling Degree Days occurred the 11th-22nd. The greatest diurnal Temperature range was 34.3° on the 9th, the least was 10.0° on the 28th.

Precipitation: With only Traces of rain recorded this month, July ended up near the 30-Year Normal of 0.03". Current Calendar-Year Total Rainfall for Jan-July 2013: Vantage Pro2 Gauge = 2.33", 4-inch Lake Region gauge = 2.71" (Normal 17.06").

Wind: All 31 days of the month measured peak gusts of ≥10 MPH, with 27 of these being ≥15 MPH, but only 5 being ≥20 MPH. The afternoon coastal breezes kicked in regularly this month.

Fog: The typical "morning overcast sky with fog, then burning off" occurred this month, but with only 1 day of Heavy Fog (<1/4 Mile visibility).

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About BelmontJeff

I live in the Portland, Oregon area and have always had a fascination with weather, its extremes, & stats. I'm also in CoCoRaHS: HAPPY VALLEY 1.7 ESE.

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