August 2025 weather in the PNW

[TigerWoodsLibido]

I have a feeling we are gonna be in for some scorchers.

[Chewbacca Defense]

5 hours ago, TigerWoodsLibido said:

I have a feeling we are gonna be in for some scorchers.

It does have that feel to it...and smoky too.  I saw a few posts on FB about new fire starts up here in the Cascades...

[LowerGarfield]

Welcome to August. Fall will be here before we know it.

[Front Ranger]

Whoops, moved this post to the right thread...

Unfortunately but not shockingly, models are backing off the rain chances next week.

[Rubus Leucodermis]

6 hours ago, TigerWoodsLibido said:

I have a feeling we are gonna be in for some scorchers.

Remember all the talk back in June about how there might be no 100  at PDX this year?

It was always obvious that was highly unlikely to happen.

[BLI snowman]

1 hour ago, Rubus Leucodermis said:

Remember all the talk back in June about how there might be no 100  at PDX this year?

It was always obvious that was highly unlikely to happen.

12z GFS throws a few triple digit days our way. 

Makes sense, as we'll have several days of only slightly above average temps and near-sprinkles to make up for by that point. 

[Front Ranger]

2 minutes ago, BLI snowman said:

12z GFS throws a few triple digit days our way. 

Makes sense, as we'll have several days of only slightly above average temps and near-sprinkles to make up for by that point. 

PDX was below average yesterday.

And will most likely be below average Sunday through Wednesday.

[Front Ranger]

CMC reintroduces the clipper trough in the mid range that the Euro was showing a day or two ago. AIFS has something kinda similar. So nothing is settled yet where the pattern goes following upcoming trough.

[BLI snowman]

10 minutes ago, Front Ranger said:

PDX was below average yesterday.

And will most likely be below average Sunday through Wednesday.

Wow, that's awesome. It was actually slightly warmer than average most everywhere else, including EUG, SLE, VUO, OLM, SEA, and BLI.

[Front Ranger]

9 minutes ago, BLI snowman said:

Wow, that's awesome. It was actually slightly warmer than average most everywhere else, including EUG, SLE, VUO, OLM, SEA, and BLI.

Yeah, just funny that you no longer focus on PDX numbers nearly as much as before - despite the fact that they are the closest major station to you.

And they're no longer a massive outlier! They finished July +1.2, cooler than EUG and SLE, about the same as OLM, and a little warmer than SEA and BLI.

[DareDuck]

Sure maybe not record warmth, but it’s been plenty warm. 

[Slushy Inch]

[BLI snowman]

3 minutes ago, Front Ranger said:

Yeah, just funny that you no longer focus on PDX numbers nearly as much as before - despite the fact that they are the closest major station to you.

And they're no longer a massive outlier! They finished July +1.2, cooler than EUG and SLE, about the same as OLM, and a little warmer than SEA and BLI.

VUO is closer to me than PDX and I actually just referenced them. 

It's been another pretty warm and dry summer here locally no matter how much you try to fight it. And now we look poised for a potentially major heat wave after the first week of the month.

Also is the 3rd driest year on record thus far at OLM (what ever happened to your fascination with them?)

[Front Ranger]

10 minutes ago, BLI snowman said:

VUO is closer to me than PDX and I actually just referenced them. 

It's been another pretty warm and dry summer here locally no matter how much you try to fight it.

VUO is not a major station lol.

Sure, it's been warm and dry. Similar to recent summers in some ways, but also different in some ways. It's ok to acknowledge both.

[DareDuck]

Bear Gulch fire causing localized smoke issues, but overall still faring well across the west. Could change if the second half of the month is warm and some of these lightning starts get a footing. 

[TT-SEA]

Now that its August and we might have a Nina developing Jim should be back soon.    When he comes back he will make a post like he never left... something like only 77 today and it was very chilly this morning.  Fully aware that everyone will make a big deal about his return.    

[Eugene-5SW]

1 hour ago, DareDuck said:

Sure maybe not record warmth, but it’s been plenty warm. 

I'd still like to know which station that is in northeast Lane County whose erroneous readings create a mini-vortex of cold anomalies on these maps. It's been going on for quite a while now.

[TT-SEA]

Another day with weak onshore flow... only 69 at SEA at 1 p.m. while it's almost 80 in NB.    The differences are significant on these days when the marine influence can make it to Seattle but not really out here.

[DareDuck]

Thunderstorm activity just to my west. Hopefully enough rain is falling with it. 

[Rubus Leucodermis]

1 hour ago, TT-SEA said:

Now that its August and we might have a Nina developing Jim should be back soon.    When he comes back he will make a post like he never left... something like only 77 today and it was very chilly this morning.  Fully aware that everyone will make a big deal about his return.    

Jim will be Jim, that is for certain.

[BLI snowman]

3 hours ago, Front Ranger said:

VUO is not a major station lol.

Sure, it's been warm and dry. Similar to recent summers in some ways, but also different in some ways. It's ok to acknowledge both.

Vancouver is one of the 5 biggest cities in WA/OR.

[T-Town]

Pretty bizarre looking sky to the west. Just 67 degrees here nearing 3 pm. 

[Front Ranger]

30 minutes ago, BLI snowman said:

Vancouver is one of the 5 biggest cities in WA/OR.

Uh huh. And we're back to why have you then focused on PDX much more in the past?

Perhaps because it's the main airport/weather station for greater Portland metro, where you live.

[DeepFriedEgg]

Still standing by my prediction. No 100 burgers for PDX until maybe September. None next summer also.

[LowerGarfield]

Light sprinkles.

[TT-SEA]

42 minutes ago, T-Town said:

Pretty bizarre looking sky to the west. Just 67 degrees here nearing 3 pm. 

Huge temp gradient today... 82 out here now with very thin high clouds at times and no smoke.

[TT-SEA]

Gi Harbor is usually almost as warm as Issaquah.   Not today.    The south sound is unusually chilly... even compared to places farther north near the water.

[T-Town]

3 minutes ago, TT-SEA said:

Gi Harbor is usually almost as warm as Issaquah.   Not today.    The south sound is unusually chilly... even compared to places farther north near the water.

We are under the smoke plume from the lake cushman fire. It’s keeping the temp way down. 

[TT-SEA]

Also related to a stationary band of high clouds that has been over the south south sound this afternoon. 

[TT-SEA]

1 minute ago, T-Town said:

We are under the smoke plume from the lake cushman fire. It’s keeping the temp way down. 

I think it's both smoke and high clouds.

[T-Town]

1 minute ago, TT-SEA said:

I think it's both smoke and high clouds.

Yay!

[Eugene-5SW]

26 minutes ago, DeepFriedEgg said:

Still standing by my prediction. No 100 burgers for PDX until maybe September. None next summer also.

And I'm going with 105+ for every day from 8/10 through 8/15 and the hottest August on record everywhere from Olympia to Medford. Even hotter next year.

Both predictions have about an equal chance of verifying.

[TT-SEA]

18Z GFS is totally dry now for the next 2 week and shows 105 in Portland next weekend.    An early August rain event made sense to me based on history.   Even a hot summer with an early start like 2015 managed to produce significant rain in the first half of August.     Getting a 2022 vibe now in terms of the length of this dry spell.   It didn't start until mid June in 2022 and went until late October.    This year it started in mid May (PDX was the exception) with no end in sight.  

[Rubus Leucodermis]

Sunny and 75.9˚F here at the moment. Surprising how persistent the low clouds are being in the South Sound region.

[TT-SEA]

4 minutes ago, Rubus Leucodermis said:

Sunny and 75.9˚F here at the moment. Surprising how persistent the low clouds are being in the South Sound region.

There no low clouds down there this afternoon.   The low clouds are very sparse even along the WA coast.   On the satellite loop the high clouds are lifting out and what is left is all smoke.   You can see in the @T-Town pic that there are no low clouds.

[MV_snow]

4 hours ago, TT-SEA said:

Now that its August and we might have a Nina developing Jim should be back soon.    When he comes back he will make a post like he never left... something like only 77 today and it was very chilly this morning.  Fully aware that everyone will make a big deal about his return.    

My only concern is that Jim left in flame out fashion last March, and if he’s pissed at the forum it may take him longer to come back. Can’t imagine he wouldn’t post the first time snow shows up on the 360h GFS, but we could be waiting until November.

[Slushy Inch]

38 minutes ago, TT-SEA said:

18Z GFS is totally dry now for the next 2 week and shows 105 in Portland next weekend.    An early August rain event made sense to me based on history.   Even a hot summer with an early start like 2015 managed to produce significant rain in the first half of August.     Getting a 2022 vibe now in terms of the length of this dry spell.   It didn't start until mid June in 2022 and went until late October.    This year it started in mid May (PDX was the exception) with no end in sight.  

12 z euro had this as well. If we are very lucky maybe a moist trough will undercut it.

[Cloud]

Looks like combo of high clouds and smoke aloft today South Sound. Sun is filtered. 

[Meatyorologist]

A warm up does look likely in the long range. The operational Euro is on the warmest side of the ensemble spread, depicting a climatologically significant heatwave mid month. The ensemble mean is yanked down from those lofty heights however by a persistent cool cluster suppressing the ridge activity to the south and extending the weak zonal flow regime we are currently entering right now. There has been a real trend all warm season to water down long range ridges, without completely denying them, so while I do suspect an August warm spell is upon us, a solution more akin to the ensemble mean with perhaps a one or two day heat spike seems appropriate; rather than the days-on-end run of 90s/100s as the operational indicates.

Concerning rain and snow, the QPF waffling from run to run regarding the late week front reflects poor agreement rather than poor potential, as depicted by the large variation in the ensemble spread. Some of those members drop more than half an inch of rain in six hours. Still time for that to trend wetter. As it stands, guidance keeps the freezing level around 8k ft during the event, so expect 0" in the metro regions near the water, with an outside potential for a slushy Tr-1" at Randy's house

[KeyPeninsula_Wx]

2 hours ago, T-Town said:

Pretty bizarre looking sky to the west. Just 67 degrees here nearing 3 pm. 

We’ve been getting low level smoke from the bear gulch fire on and off the last couple days but just elevated at the moment. It was actually pretty nasty here Wednesday evening for a bit.