CLOUDY NIGHTS, SUNNY DAYS: U.S. CITIES MOST LIKELY TO HAVE
OVERCAST SKIES AT NIGHT VERSUS DAY
Coastal California is known for having a lot of low clouds (and
sometimes fog) at night and in the morning, but it is usually sunny
during the afternoon. This is especially true in southern California
where a few locations are twice as likely (or 100% more likely) to
have overcast skies at night (hours calculated between 9 PM and 5 AM
standard time) as during the day (hours calculated between 9 AM and
5 PM standard time).
Most other parts of the United States either are more likely to
be cloudy during the day or have a fairly even distribution between
daytime and nighttime cloudiness.
Cities are listed below if they have an airport observation (or one
nearby) with a long-term record. Many nearby cities would likely
make this list if they could be included.
1. Oceanside, California*
2. Imperial Beach, California
3. San Diego, California
4. Irvine, Califonia**
5. Long Beach, California
5. Santa Maria, California
7. Los Angeles, California***
7. Monterey, California
9. Victorville, California
10. Oxnard, California****
HOW MUCH MORE OFTEN
(%) OVERCAST SKIES OCCUR
BETWEEN 9 PM AND 5 AM
VERSUS 9 AM AND 5 PM
* Data used from Camp Pendleton.
** Data used from Tustin and El Toro (former bases now closed).
*** Data used from LAX.
**** Data used from Pt. Mugu.
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Copyright ©2007 Brandt Maxwell.