Jamestown (CA) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Jamestown

Jamestown average temperature chart (Celsius) Jamestown average temperature chart (Fahrenheit)
Average monthly temperatures in Jamestown (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 11.5 14.8 16.5 20.1 25.2 30.2 34.1 33.5 29.9 24.3 16.1 11.2
°F 52.7 58.6 61.7 68.1 77.3 86.3 93.3 92.2 85.8 75.8 60.9 52.2

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Jamestown monthly rainfall chart (mm) Jamestown monthly rainfall chart (inches)
Average monthly rainfall in Jamestown (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 132 115 117 67 16 5 2 4 13 42 112 109
inches 5.2 4.5 4.6 2.6 0.6 0.2 0.1 0.2 0.5 1.7 4.4 4.3
Rainy days 7 7 7 5 2 1 1 1 2 3 6 7

Average annual rainfall in Jamestown: 652.2mm (256.8 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Jamestown

Jamestown average daily sunshine chart
Average daily sunshine Jamestown
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 7.9 9.9 11.8 13.4 14.4 14.6 13.5 12.2 10.4 7.2 5.4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Jamestown average minimum / maximum temperatures (Celsius) Jamestown average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Jamestown (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.3 1.7 3.2 4.8 8 11.4 13.9 13.5 11.1 7.1 3 0.3
Max °C 11.8 15.1 16.9 20.5 25.6 30.7 34.6 34 30.4 24.8 16.4 11.5
Min °F 32.5 35.1 37.7 40.6 46.4 52.4 56.9 56.2 51.9 44.7 37.4 32.5
Max °F 42.8 47.1 50 54.7 62.2 69.8 75.6 74.7 69.3 60.6 49.5 42.6

Sea temperature

The graph below shows the average sea temperature.

Jamestown average sea temperature chart (Celsius) Jamestown average sea temperature chart (Fahrenheit)
Average sea temperature around Jamestown in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.5 12.4 12.3 12.3 12.7 13.6 15 15.9 16 15.4 14.3 13.1
°F 54.5 54.3 54.2 54.1 54.8 56.5 59.1 60.6 60.7 59.7 57.7 55.6

Wind speed

The graph below shows the average wind speed.

Jamestown average winspeed by month (km/h) Jamestown average winspeed by month (mph)
Average wind speed in Jamestown (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 12 14 14 16 16 14 13 12 10 10 11
mph 7 7 9 9 10 10 9 8 7 7 6 7

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Jamestown relative humidity averages
Average relative humidity in Jamestown
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
80% 73% 66% 56% 49% 45% 42% 46% 50% 57% 72% 80%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Jamestown weather stats

Jamestown weather statistics
Hottest month: July 34.1°C 93.4°F
Driest month: July 2mm 0.1ins
Sunniest month: July 14.6hrs
Coldest month: December 11.2°C 52.2°F
Wettest month: January 132mm 5.2ins
Warmest sea: September 16°C 60.8°F
Map showing location of Jamestown (37.95326, -120.4227) Jamestown map pin © Google

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