Climate, Global Warming, and Daylight Charts and Data

Scroll down to see the all the data on which the charts are based. Also see Explanation, background, and discussion.
Global Warming/Climate Change for SEATTLE TACOMA AP, Washington, USA

One predicted temperature increase is
between 3°C and 5°C (5.4°F and 9.0°F).
See About the Global Warming Data for more information about this prediction.

climate chart for SEATTLE TACOMA AP, WA
Daylight chart for {A['location']}, Washington, USA

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Explanation, Data Sources, Background and Discussion.

Data for SEATTLE TACOMA AP, Washington, USA

NOAA Station Id: WA457473 Latitude: 47°27'41N Longitude: 122°18'49W Elevation: 400'

Sunrise and Sunset Data

The yellow section shows when the sun is up, and how this changes over the year. Use the time-of-day scales, on the left and right, and the month scale on the top and bottom, to tell approximately when sunrise and sunset occur. See Sunrise, Sunset, and Daylight for more info.

The sunrise and sunset times shown in the chart are approximate. They are accurate for the latitude, and show the precise amount of daylight, but the rise and set times may be offset (up or down in the chart) since I don't have an automated way of matching time zones to longitudes. The charts are made assuming that the location is in the middle of an evenly spaced time zone.

For precise times see US Naval Observatory. For SEATTLE TACOMA AP, WA, use latitude 47°27'41N and longitude 122°18'49W in the form. You'll need to know the time zone of the location.

Climate (Average Weather) Data

Minimum Temperature°F35.937.
Maximum Temperature°F45.849.553.258.264.469.675.375.670.259.750.545.559.79
Heating Degree Days7476135824472911505545138383592754399.75
Cooling Degree Days000051965651900014.42
Monthly Precipitationinches5.134.183.752.591.781.490.791.021.633.195.95.623.09

First and Last Frost Dates

First FrostLast Frost
OCT 28NOV 17DEC 07FEB 13MAR 10APR 04
Explanation of frost dates.

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