October to be on cool side

Expect temperatures to be below normal in the Tri-Cities this month, according to the National Weather Service.

That follows a September that was significantly warmer than usual in the Tri-Cities and saw six daily high temperature records set or tied at Hanford.

Normal highs for October in the Tri-Cities fall from 70.5 degrees at the start of October to 62.6 degrees at the end of the month. Normal lows fall from 43.1 degrees to 39.2 degrees, according to the weather service.

October also is expected to be wetter than usual in the Tri-Cities after a September with little rain. Normal precipitation for October is 0.57 inch.

In September, the average temperature was 69.1 degrees in the Tri-Cities, which was 3.8 degrees above normal. High temperatures averaged 83.4 degrees, which was 3.6 degrees above normal. The highest was 95 degrees on Sept. 8. The temperature was in the 90s on nine days.

Low temperatures averaged 54.7 degrees, which was 4 degrees above normal. The lowest temperature was 45 degrees on Sept. 29.

At Hanford, the most recent daily high temperature record set was 95 degrees on Sept. 23, according to data from the Hanford Meteorological Station. The previous record high for the date was 93 degrees in 1987.

New daily high records of 100 degrees were set on Sept. 11 and 12. A fourth daily record high for the month was set Sept. 10 when the high reached 98. The high of 98 degrees on Sept. 9 and high of 97 on Sept. 7 tied the records for those dates.

The highest temperatures at Hanford last month were the record-setting 100 degrees and the temperature was at least 90 degrees on 12 days. The coolest temperature was 44 degrees on Sept. 26.

In the Tri-Cities, precipitation totaled 0.03 inch in September, with measurable rain on just two days. The total is 0.32 inch below normal. At Hanford precipitation totaled 0.05 inch in September, with rain on five days.

Precipitation for the year in the Tri-Cities has totaled 4.54 inches, which is within 0.01 inch of normal. For the water year, which starts in October, The Tri-Cities had 9.16 inches, which is about 2 inches above normal.

The highest wind gust in the Tri-Cities in September was 31 mph, recorded Sept. 27. At Hanford it was 45 mph on Sept. 25.

w Annette Cary: 582-1533; acary@tricity herald.com