Weather Blog

It was cold, except when it was hot...

It was cold, except when it was hot...
A skimboarder makes the best of a dreary day at Dash Point State Park in Federal Way, Wash. on Monday, September 6, 2010.

Now that we're done with the summer months and are about to enter the start of our rainy season on Oct. 1, I thought it'd be neat to go back and check out just how this summer fared.

As I wrote about on Sept. 10, September might go down as the sixth straight cooler-than-normal month, although it is just slightly cooler and depending on how warm we end up Thursday, it could could perhaps go down as even.

I also wrote about how we were the third lowest tally of 70 degree days in a year, a place we're still in and likely to finish.

But Dana Felton at the National Weather Service just sent me some great charts that show just how extreme our summer was in the all or nothing category.

Check these interesting statistics out:

70 degree days (See chart)

Yes, Seattle stands in third fewest amount of 70 degree days a year:

Top 5 fewest 70 degree days in a year:

1) 46 (1955)
2) 53 (1954)
3) 58 (2010 -- thru Sept. 30)
4) 65 (1980, 1964)
5) 66 (1956)

We average 79 a year.

75 degree days (See chart)

Seattle is currently 6th lowest amount of 75 degree days with 31 through Sept. 29, although this could go into a tie if Thursday ends up warmer than 75. We average about 45 a year.

1) 12 (1954)
2) 24 (1955)
3) 28 (1957)
4) 29 (1964)
5) 30 (1953)
6) 31 (2010 through Sept. 29)
7) 32 (1959)

80 degree days (See chart)

For 80 degree days, Seattle has had 20 of them -- just under the average of 25 per year and not in the top 10 fewest. (Worst was 1954, with just 2 80 degree+ days.)

85 degree days (See chart)

Start tracking over 85 degrees, and now the summer gets interesting. Seattle has had 11 days at 85 or hotter -- actually slightly above the average of 10. Worst is a tie for 1954 and 1957, which never reached over 85. Hottest was 1967 with 22 days over 85. (Last summer was tied for second at 21 days.)

90 degree days (See chart)

And finally, the full juxtaposition. With 6 days over 90 in 2010, the year is tied for 5th-most all time, although that is a long tie with 8 other years. We average 2.7 per year.

The record amount was 9 days in 1958 (last summer had 7, but also had a few 89's so it was close). There were 15 years, last done in 2005, where we did not reach 90 degrees.

So the numbers prove that it was mostly a chilly summer, but when it wasn't, it really wasn't!