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City briefing

Rossmoor

California, United States · 12,000 people
Jan
Feb
Mar
Apr
May
Jun
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Aug
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The year’s records
Annual mean 18°C · wettest around January · prevailing wind SW
Warmest
28.4 °C
Coldest
16.6 °C
Wettest
17%
Windiest
3.6 m/s
Prevailing
SW
3.0 m/s average

When this place is good five ratings · thirty-six ten-day sections · click a cell to read it

never good
Jan
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Every reading

bars actual · line feels-like, °C
051015202530JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember051015202530JFMAMJJASOND

The average temperature in Rossmoor over the whole year is 18°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about 10°C.

Month by month Rossmoor climate by month: average temperatures year round · click a month to read it

MonthHighLowFeels likeChance of rainCloudWindBeing outsideSunWalking
January17°C10°C15°C14%33%1.8 m/s55286
February18°C10°C15°C14%33%2.0 m/s55482
March18°C11°C15°C13%40%2.3 m/s58484
April20°C13°C18°C7%37%2.4 m/s741081
May20°C15°C19°C5%52%2.4 m/s821081
June23°C18°C23°C3%45%2.4 m/s832959
July26°C20°C26°C1%28%2.4 m/s655830
August27°C20°C27°C5%25%2.3 m/s576621
September27°C19°C26°C3%31%2.1 m/s645132
October25°C16°C23°C8%28%1.8 m/s783850
November22°C13°C19°C9%24%1.6 m/s821376
December18°C10°C16°C12%30%1.6 m/s63288

High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.

Seasons, and the year in short Rossmoor weather by season

Year round, Rossmoor has days of about 17°C at their warmest in January, its coolest month, and 27°C in August, its warmest; the coolest hours of the day run from 10°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around January and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.

Rossmoor weather in winterDecember to February

High 18°CLow 10°CRain 14%

Winter in Rossmoor has typical daily highs of about 18°C and lows of about 10°C, with a 14% chance of rain on a given day.

Rossmoor weather in springMarch to May

High 20°CLow 13°CRain 8%

Spring in Rossmoor has typical daily highs of about 20°C and lows of about 13°C, with a 8% chance of rain on a given day.

Rossmoor weather in summerJune to August

High 26°CLow 19°CRain 3%

Summer in Rossmoor has typical daily highs of about 26°C and lows of about 19°C, with a 3% chance of rain on a given day.

Rossmoor weather in autumnSeptember to November

High 24°CLow 16°CRain 7%

Autumn in Rossmoor has typical daily highs of about 24°C and lows of about 16°C, with a 7% chance of rain on a given day.

When is the rainy season in Rossmoor?

Rossmoor has no sharply defined rainy season: the chance of rain on a given day runs from 1% in July, the driest month, to 14% in January, the wettest.

What time of year is Rossmoor windiest?

Winds in Rossmoor are highest in April, averaging 2.4 m/s (9 km/h), and lightest in November, at 1.6 m/s (6 km/h). The prevailing wind is from the SW.

What is the average temperature in Rossmoor year round?

The average temperature in Rossmoor over the whole year is 18°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about 10°C.

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