Plateau Weather

Plateau Weather Weather info for the Sammamish and Issaquah Plateau

06/16/2026

Even with the high clouds around today, it was a hot day…several weather stations around the Plateau reached the 90° mark - and several low-90s around the Eastside! Sea-Tac set a daily record of 91°, beating the previous record of 88°. The Heat Advisory expires at 5am tomorrow (Tuesday) morning, reflecting the potential for one last warm overnight.

Tomorrow will be 15-20 degrees cooler than today - kinda weird saying “low-70s” counts as “cool”, but here we are! It’ll be a little cloudier and a tad breezy too…rinse-and-repeat for Wednesday. A little warmer by the end of the week, into the upper-70s to low-80s - a much more manageable warmth!

06/15/2026

Monday morning update: Heat Advisory is still in effect until 5am tomorrow. Yesterday afternoon topped out in the upper-80s - as of 8:30am this morning, we're already five degrees warmer than we were at 8:30am yesterday morning! I'd bet we'll touch 90º by mid-afternoon, with a chance of climbing a few degrees more into low-90s too.

Tonight will be the warmest overnight of this stretch, which won't bring a ton of relief from the heat. Last night dropped to 58º in my backyard just before sunrise this morning, but it doesn't look like we'll get below the low-60s tonight...

We'll take a look at the week ahead later today - but the spoiler is, tomorrow's back to "normal-ish" in the mid-70s!

06/14/2026

Sunday early AM update: the Heat Advisory goes into effect at 11am this morning. It’s only in the mid-50s as of 6:30am, but it’s going to warm up quickly this morning - plan on upper-80s to near 90° for this afternoon. Stay cool, stay hydrated!

06/12/2026

⚠️🥵 Heat Advisory from 11am Sunday to 5pm Tuesday 🥵⚠️

Our first heat wave of the summer is here! It's only a few days, and it's not too extreme...though it will get hot.

Quick breakdown of the temps I'm expecting for the Plateau, then I'll get into a little more detail:
- Friday: mid- to upper-70s, overnight lows in the low-50s
- Saturday: mid-80s, overnight lows in the mid-50s
- Sunday: mid- to upper-80s to near-90º, overnight lows in the low-60s
- Monday: upper-80s to low-90s, overnight lows in the low-60s (warmest day and overnight)
- Tuesday: upper-70s, overnight lows in the mid-50s

Today (Friday) should be quite pleasant! Things continue ratcheting up from here. Monday looks to be the peak of this heat wave, with temps in the low-90s. Tuesday begins the cooldown, before we get back closer to normal on Wednesday and Thursday.

A couple other notes worth mentioning:

Generally speaking, the overnight temps should bring some relief, and a chance for us to open windows and cool things down. However, Sunday and Monday nights will stay relatively warm, only dropping to the low-60s by the early morning hours.

For those of you who are a little more sensitive to moisture levels in the air, it might feel on the border of "comfortable" and "slightly sticky". It's not going to be like those humid heat waves we've had in past years, but it's not going to be Nevada or Arizona-levels of dry air either!

I'll end with some safety tips:
- The UV index is expected to be high the next few days, so make sure to wear (and re-apply) sunscreen if you're outside!
- Also, stay hydrated - heat stroke can occur even in warm temps, and especially in high temps.
- On the flip-side, area lakes and rivers are still relatively cold - make sure you've got life jackets and are with other people if you're out on the water.
- And please avoid taking pets for walks in the peak heat of the day - they can suffer heat stroke more easily, since they don't sweat like humans. If you can't hold the back of your hand to the pavement for 5-7 seconds, it's too hot for pets' paws!

06/09/2026

June-uary is almost over! And more summer-like weather is around the corner...

Fairly steady rain continues overnight tonight (Monday night), turning to showers tomorrow (Tuesday)...close to 0.25" as of just before 9pm, and we could add an additional half-inch by noon tomorrow! Temps only in the low-60s again tomorrow afternoon. There's a chance of a convergence zone developing in the afternoon/evening timeframe, which could bring heavier rain and a potential for a lightning strike or two. I'll keep an eye on things and keep you posted if anything looks impactful!

Wednesday is a bit of a transition day...a few showers might stick around in the morning, before drying out the rest of the day. We'll also begin our slow climb to near-normal (and eventually above-normal) temps - mid-60s for Wednesday's afternoon high temp!

Thursday begins the warm-up - upper-60s to near 70º, and adding several degrees every day thru the weekend. Still a little too far out to know specifics, but we do know it's gonna be hot this weekend and early next week. At this point, it's looking like mid- to possibly upper-80s on Sunday, with a couple days into next week looking hot as well.

If you're not already aware of Watch Duty, you should be! They've been a trusted source of wildfire info and alerts for ...
06/09/2026

If you're not already aware of Watch Duty, you should be! They've been a trusted source of wildfire info and alerts for many years - including many wildfires around the PNW.

Today, they launched flood coverage for major floods across the United States. Both types of natural disasters are fairly common across the state, so it's a good idea to have the app on your phone just in case.

If you haven’t already, download or update the Watch Duty app, available on iOS, Android, and the web: watchduty.org

(Full disclosure: I recently started volunteering with Watch Duty as a meteorological specialist and contributor...so while I could technically say "we launched", I had nothing to do with the development - but I'm still incredibly excited to be part of the team!)

06/05/2026

I've got "bright news" and "dim news", kinda like good news / bad news...on the bright side, as of tonight, sunsets are after 9pm until mid-July!! On the dim side, it's gonna be cold and damp the next few days (and nights).

Tomorrow (Friday) looks pretty benign - cloudy, scattered showers, afternoon highs only in the low-60s.

Saturday is shaping up to be a bit of an interesting day, in two noticeable ways: afternoon highs probably won't break out of the upper-50s; and there's a decent chance of thunderstorms midday into the evening. Wherever they pop up, they could bring lightning, heavier downpours, small hail, and gusty winds - get indoors if you hear thunder nearby! They'll be moving roughly west-to-east, so keep an eye on the sky towards Seattle and Bellevue if you're outside.

Sunday, things calm down a bit...afternoon high temps bounce back into the mid-60s, and while we'll stay mostly cloudy, there's only a slight chance of an afternoon shower. Looking a bit further into next week - another system comes through with some showers early in the week, before we look to dry out and warm up by the end of the week.

06/02/2026

It's June 1st - today marks the start of meteorological summer! For stats and record-keeping purposes, it's easier to use the first of the month rather than the solstice or equinox dates, which aren't always the same year-to-year.

Tomorrow (Tuesday) will definitely feel like summer - afternoon highs in the upper-80s, though touching 90º isn't completely out of the question. The air will feel pretty dry - not quite Arizona-dry, but let's still call it "nose bleed weather". However, that also means an increase in fire danger across the entire area.

The heat is short-lived - Wednesday and Thursday drop back to the upper-60s to low-70s, before we knock another 10 degrees off Friday and Saturday, closer to 60º both days. Chance of showers return Wednesday, before a better chance in the Friday/Saturday timeframe. On the bright side, we've had worse "June-uary" weather before - I'll take it!

05/28/2026

Thursday morning update: A *slight* chance of thunderstorms late this evening across Western Washington...honestly not expecting much activity, aside from some overnight showers - though the rain could be heavier at times, and can't rule out a few lightning strikes. If things changes as the afternoon and evening goes on, I'll keep you posted! Until then, it'll be a pretty gorgeous day - afternoon highs near 80º! Clouds will start to build later this afternoon into the evening, but we'll stay mostly sunny until then.

Normally I wouldn't make a big deal about these types of storm setups, aside from a quick mention - but it *does* look like it might meet "severe storm" criteria in Eastern Washington and Oregon this afternoon and this evening. If you've got friends or family over there, make sure they're aware - main threats looks to be strong winds and decent-sized hail!

Tomorrow (Friday) still looks cool and showery, though no thunderstorm chances. We'll start to bounce back thru the weekend - partly sunny and low- to mid-60s by Saturday, partly- to mostly-sunny and mid- to upper-60s on Sunday.

05/26/2026

It's the last week of May, though today felt a bit like "June-uary" - and the next couple days will too!

After the main band of rain *finally* moved through late this afternoon, it's left us with the chance of scattered showers thru tomorrow (Tuesday). Not expecting more than a few hundredths...enough to wet the ground, if anything. One more day of temps on the chilly side - low-60s tomorrow too.

A temporary bounce back in temps Wednesday and Thursday - back into the low- to mid-70s on Wednesday, and possibly even 80s on Thursday! The warmth is short-lived though, as another system takes a swing at the PNW by Friday...shower chances reappear, and temps look to drop back into the 60s again. This is actually pretty normal for this time of year - we've been spoiled the past several weeks with more summer-like weather!

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