AgWeatherNet Independence Day Weather Outlook

Sunny and Pleasant on the 4th of July; Heat Wave Likely by This Weekend

Nic Loyd, Meteorologist, 509-786-9357
Gerrit Hoogenboom, Director, 509-786-9371

The 4th of July looks to be sunny, dry, and pleasant, with seasonal temperatures and light winds. Following a clear and cool morning featuring lows in the 40s, and potentially upper 30s in the coldest areas, an intense July sun and very dry air will allow temperatures east of the Cascades to rebound into the mid 70s to mid 80s by Wednesday afternoon.

Relatively cool and breezy conditions on Tuesday will give way to steadily increasing warmth later this week, as the first strong and summer-like ridge of high pressure of the season builds into the region. Showers are likely tonight and into Tuesday morning in western Washington, with a chance of showers or thunderstorms lingering in eastern and northern Washington into early Tuesday. Some snow may even fall in the Cascade high country. South central Washington will remain mostly dry with the cold frontal passage. It will be mostly sunny and dry in many areas east of the Cascades on Tuesday, but also slightly cool and breezy, with blowing dust possible. Beginning on Tuesday night, the state should be dry through at least the coming weekend. Later in the week, the weather will be sunny, calm, and much warmer.

It appears that the hottest weather of the year will arrive this weekend. Widespread 90s are likely east of the Cascades, while hot areas of central Washington may climb above 100 degrees. The sunny and hot weather combined with low relative humidity will likely cause increasingly dangerous fire conditions as time progresses. During the early part of the warm spell, dry and stable conditions will hopefully allow some overnight temperature recovery to take place, as lows in the 50s continue in certain areas later this week. However, night-time thermal belts will likely develop later in the weekend, and many areas such as exposed slopes will remain warm and dry overnight, with lows only falling into the 60s and low 70s. The magnitude of the warm up is much more uncertain west of the Cascades, although it appears that especially interior western Washington should experience significantly warmer weather by the weekend.

Temperatures
  • Trending from below average on Tuesday to well above average by the weekend.
  • Pleasant on the 4th of July with highs in the mid 70s to mid 80s in central Washington and 60s to low 70s in western Washington.
  • Highs in central Washington trending from the 70s to around 80 on Tuesday to the 90s to low 100s by Sunday.
  • Highs in western Washington trending from the upper 50s to 60s on Tuesday to the 70s to mid 80s by the weekend.

Rainfall
  • Rain or showers in western Washington on Monday night, and then a chance of showers lingering into Tuesday.
  • A chance of showers or thunderstorms through Tuesday morning in eastern and northern Washington.
  • Beginning later on Tuesday, mostly dry statewide through next weekend.

Wind
  • Breezy to windy on Tuesday. Generally lighter winds for Wednesday and into the weekend.

Important Points about This Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 80s and lows in the 50s.
This Week
  • Mostly sunny and dry.
  • Highs warming from the 70s to around 80 on Tuesday to the mid 80s to around 90 by Friday.
  • Lows in the 50s to around 60 on Tuesday morning.
  • Lows trending from the 40s on Wednesday morning to the 50s to around 60 by the end of the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid 80s and lows in the mid 50s.
This Week
  • A chance of showers or thunderstorms through Tuesday morning. Sunny and dry for the remainder of the period.
  • Highs warming from the 70s on Tuesday to the mid 80s to around 90 by Friday.
  • Lows in the 50s to around 60 on Tuesday morning.
  • Lows trending from the 40s to low 50s on Wednesday morning to the 50s to around 60 by the end of the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs around 80 and lows around 50.
This Week
  • Showers likely and a chance of thunderstorms through early Tuesday. Dry for the remainder of the period.
  • Highs warming from the mid to upper 60s on Tuesday to the low 80s by Friday.
  • Lows in the low 50s on Tuesday morning.
  • Lows trending from the low 40s on Wednesday morning to the low to mid 50s by the end of the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the 70s (except mid to upper 60s at the coast) and lows in the low to mid 50s.
This Week
  • Showers likely tonight and into Tuesday morning. Dry for the remainder of the period.
  • Highs warming from the upper 50s to 60s on Tuesday to the 70s by Friday.
  • Lows in the upper 40s to mid 50s on Tuesday morning.
  • Lows trending from the 40s to low 50s on Wednesday morning to the low to mid 50s by the end of the week.

The AgWeatherNet Team wishes you a happy and safe Independence Day Holiday!


Washington State University