Columbia River above Grand Coulee Dam
1.4 mi- Level
- 1288 ft
Reading from Sat 2 AM · NWS gauge page
Model estimate for 3:00 AM PDT (no recent station report)
Grand Coulee, WA weather
Clear and 36°2°.
Today: low 34°1° (likely 30°−1° to 38°3°), high 59°15° (likely 51°11° to 59°15°).
Now 36°2°
Clear
- Wind
- Calm
- Up to 7 mph11 km/h through 3 PM
- Dew point
- 18°−8°
- Dry · up to 27°−3° by 10 AM
- UV tomorrow
- 3Moderate
- Moderate 1–2 PM · peak 3
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
Good hours for
TonightNear 36°2° · Clear
This morningUp to 47°8° by 11 AM · Mostly cloudy
This afternoonUp to 58°14° by 3 PM · Mostly cloudy
TonightDown to 40°4° by 5 AM · Mostly cloudy
Tomorrow morningUp to 52°11° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 63°17° by 3 PM · Mostly cloudy
Tomorrow nightDown to 45°7° by 2 AM · rain chance 20% · Cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 3a | Clear | 36°2° (likely 35°2° to 40°4°) | 36°2° | 0% | 1 mph2 km/h from N, gusts 4 mph6 km/h | 48% | 2% | 0 |
| Sat 4a | Clear | 35°2° (likely 34°1° to 40°4°) | 35°2° | 0% | 1 mph2 km/h from N, gusts 3 mph5 km/h | 51% | 9% | 0 |
| Sat 5a | Clear | 35°2° (likely 33°1° to 39°4°) | 35°2° | 0% | 1 mph2 km/h from NE, gusts 3 mph5 km/h | 53% | 44% | 0 |
| Sat 6a | Mostly cloudy | 34°1° (likely 32°0° to 40°4°) | 34°1° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 57% | 49% | 0 |
| Sat 7a | Mostly cloudy | 35°2° (likely 32°0° to 38°3°) | 35°2° | 0% | 2 mph3 km/h from SE, gusts 6 mph9 km/h | 55% | 57% | 0 |
| Sat 8a | Partly sunny | 35°2° (likely 31°−1° to 39°4°) | 32°0° | 0% | 3 mph5 km/h from SE, gusts 5 mph9 km/h | 57% | 66% | 0 |
| Sat 9a | Partly sunny | 38°3° (likely 36°2° to 41°5°) | 34°1° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 52% | 65% | 0 |
| Sat 10a | Mostly sunny | 43°6° (likely 42°6° to 46°8°) | 39°4° | 0% | 6 mph10 km/h from SE, gusts 8 mph13 km/h | 53% | 68% | 1 |
| Sat 11a | Partly sunny | 47°8° (likely 45°7° to 49°9°) | 44°7° | 0% | 7 mph11 km/h from SE, gusts 8 mph13 km/h | 48% | 68% | 1 |
| Sat 12p | Mostly sunny | 52°11° (likely 48°9° to 52°11°) | 52°11° | 0% | 7 mph11 km/h from SE, gusts 10 mph15 km/h | 45% | 65% | 2 |
| Sat 1p | Partly sunny | 55°13° (likely 50°10° to 55°13°) | 55°13° | 0% | 7 mph11 km/h from SE, gusts 9 mph15 km/h | 40% | 77% | 2 |
| Sat 2p | Cloudy | 56°13° (likely 51°11° to 56°13°) | 56°13° | 0% | 7 mph11 km/h from SE, gusts 9 mph15 km/h | 38% | 86% | 1 |
| Sat 3p | Partly sunny | 58°14° (likely 51°11° to 58°14°) | 58°14° | 0% | 7 mph11 km/h from S, gusts 12 mph19 km/h | 35% | 91% | 1 |
| Sat 4p | Cloudy | 58°14° (likely 51°11° to 58°14°) | 58°14° | 0% | 6 mph10 km/h from S, gusts 11 mph18 km/h | 35% | 76% | 1 |
| Sat 5p | Cloudy | 57°14° (likely 51°11° to 57°14°) | 57°14° | 0% | 5 mph8 km/h from SE, gusts 10 mph16 km/h | 36% | 74% | 1 |
| Sat 6p | Mostly cloudy | 54°12° (likely 48°9° to 54°12°) | 54°12° | 0% | 3 mph5 km/h from SE, gusts 8 mph12 km/h | 41% | 59% | 0 |
| Sat 7p | Cloudy | 50°10° (likely 45°7° to 50°10°) | 49°9° | 0% | 3 mph5 km/h from SE, gusts 5 mph8 km/h | 44% | 69% | 0 |
| Sat 8p | Cloudy | 49°9° (likely 45°7° to 49°9°) | 49°9° | 0% | 2 mph3 km/h from E, gusts 4 mph7 km/h | 45% | 73% | 0 |
| Sat 9p | Mostly cloudy | 48°9° (likely 44°7° to 48°9°) | 47°8° | 0% | 3 mph5 km/h from E, gusts 4 mph7 km/h | 50% | 68% | 0 |
| Sat 10p | Mostly cloudy | 46°8° (likely 43°6° to 46°8°) | 45°7° | 0% | 3 mph5 km/h from NE, gusts 4 mph6 km/h | 53% | 72% | 0 |
| Sat 11p | Mostly cloudy | 45°7° (likely 42°6° to 45°7°) | 44°7° | 0% | 3 mph5 km/h from NE, gusts 4 mph7 km/h | 54% | 67% | 0 |
| Sun 12a | Mostly cloudy | 43°6° (likely 42°6° to 44°7°) | 41°5° | 0% | 3 mph5 km/h from NE, gusts 4 mph6 km/h | 59% | 68% | 0 |
| Sun 1a | Cloudy | 41°5° (likely 41°5° to 43°6°) | 39°4° | 0% | 3 mph5 km/h from NE, gusts 5 mph8 km/h | 60% | 76% | 0 |
| Sun 2a | Cloudy | 41°5° (likely 41°5° to 42°6°) | 39°4° | 0% | 3 mph5 km/h from N, gusts 6 mph9 km/h | 61% | 76% | 0 |
| Sun 3a | Cloudy | 41°5° (likely 40°4° to 42°6°) | 39°4° | 0% | 3 mph5 km/h from N, gusts 5 mph8 km/h | 59% | 77% | 0 |
| Sun 4a | Cloudy | 41°5° (likely 39°4° to 42°6°) | 39°4° | 0% | 3 mph5 km/h from NE, gusts 6 mph10 km/h | 61% | 77% | 0 |
| Sun 5a | Cloudy | 40°4° (likely 39°4° to 42°6°) | 38°3° | 0% | 3 mph5 km/h from NE, gusts 6 mph10 km/h | 61% | 79% | 0 |
| Sun 6a | Cloudy | 40°4° (likely 39°4° to 42°6°) | 38°3° | 0% | 3 mph5 km/h from NE, gusts 6 mph10 km/h | 64% | 79% | 0 |
| Sun 7a | Cloudy | 40°4° (likely 39°4° to 42°6°) | 38°3° | 0% | 3 mph5 km/h from NE, gusts 6 mph9 km/h | 61% | 80% | 0 |
| Sun 8a | Cloudy | 40°4° (likely 40°4° to 42°6°) | 37°3° | 0% | 5 mph8 km/h from NE, gusts 5 mph9 km/h | 61% | 80% | 0 |
| Sun 9a | Cloudy | 44°7° (likely 42°6° to 44°7°) | 41°5° | 0% | 5 mph8 km/h from NE, gusts 5 mph9 km/h | 54% | 75% | 0 |
| Sun 10a | Cloudy | 48°9° (likely 47°8° to 51°11°) | 46°8° | 0% | 5 mph8 km/h from NE, gusts 6 mph10 km/h | 53% | 81% | 1 |
| Sun 11a | Cloudy | 52°11° (likely 50°10° to 55°13°) | 52°11° | 5% | 6 mph10 km/h from E, gusts 10 mph17 km/h | 47% | 82% | 2 |
| Sun 12p | Cloudy | 56°13° (likely 53°12° to 59°15°) | 56°13° | 5% | 6 mph10 km/h from E, gusts 14 mph23 km/h | 44% | 82% | 2 |
| Sun 1p | Cloudy | 59°15° (likely 56°13° to 62°17°) | 59°15° | 5% | 6 mph10 km/h from E, gusts 17 mph27 km/h | 40% | 81% | 3 |
| Sun 2p | Cloudy | 61°16° (likely 57°14° to 63°17°) | 61°16° | 5% | 6 mph10 km/h from E, gusts 17 mph28 km/h | 38% | 83% | 2 |
| Sun 3p | Cloudy | 63°17° (likely 58°14° to 64°18°) | 63°17° | 5% | 6 mph10 km/h from E, gusts 18 mph29 km/h | 37% | 83% | 2 |
| Sun 4p | Cloudy | 62°17° (likely 57°14° to 64°18°) | 62°17° | 5% | 6 mph10 km/h from E, gusts 18 mph29 km/h | 38% | 83% | 1 |
| Sun 5p | Cloudy | 60°16° (likely 55°13° to 60°16°) | 60°16° | 10% | 5 mph8 km/h from E, gusts 16 mph26 km/h | 41% | 83% | 1 |
| Sun 6p | Cloudy | 58°14° (likely 55°13° to 58°14°) | 58°14° | 10% | 5 mph8 km/h from E, gusts 10 mph16 km/h | 44% | 84% | 0 |
| Sun 7p | Cloudy | 55°13° (likely 52°11° to 55°13°) | 55°13° | 10% | 5 mph8 km/h from E, gusts 7 mph12 km/h | 46% | 86% | 0 |
| Sun 8p | Cloudy | 52°11° (likely 50°10° to 55°13°) | 52°11° | 10% | 5 mph8 km/h from NE, gusts 6 mph10 km/h | 48% | 84% | 0 |
| Sun 9p | Cloudy | 51°11° (likely 49°9° to 53°12°) | 51°11° | 10% | 5 mph8 km/h from NE, gusts 5 mph9 km/h | 50% | 88% | 0 |
| Sun 10p | Cloudy | 49°9° (likely 49°9° to 53°12°) | 47°8° | 10% | 5 mph8 km/h from NE, gusts 5 mph7 km/h | 53% | 90% | 0 |
| Sun 11p | Cloudy | 48°9° (likely 48°9° to 51°11°) | 46°8° | 20% | 5 mph8 km/h from N, gusts 6 mph9 km/h | 55% | 94% | 0 |
| Mon 12a | Cloudy | 47°8° (likely 46°8° to 48°9°) | 45°7° | 20% | 5 mph8 km/h from N, gusts 5 mph8 km/h | 57% | 94% | 0 |
| Mon 1a | Cloudy | 46°8° (likely 44°7° to 47°8°) | 44°7° | 20% | 5 mph8 km/h from N, gusts 5 mph8 km/h | 59% | 88% | 0 |
| Mon 2a | Cloudy | 45°7° (likely 45°7° to 47°8°) | 44°7° | 20% | 3 mph5 km/h from N, gusts 4 mph7 km/h | 61% | 84% | 0 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Partly sunny. High 59°15°, low 34°1°. Typical 55°13° / 37°3°. Dry. Forecasts differ.
Morning
6 AM–noon
Partly sunny, 35°2°Dry
Afternoon
noon–6 PM
Partly sunny, 58°14°Dry
Evening
6 PM–midnight
Mostly cloudy, 49°9°Dry
Overnight
midnight–6 AM
Cloudy, 40°4°Dry
Official NWS forecast
Today: Mostly sunny. High near 59, with temperatures falling to around 57 in the afternoon. Southeast wind 1 to 7 mph.
Tonight: Partly cloudy, with a low around 34. Northeast wind around 1 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 51°11°–59°15°
- Low, likely
- 30°−1°–38°3°
- Typical high / low
- 55°13° / 37°3°
- Wind
- 9 mph14 km/h, gusts 15 mph24 km/h
- UV peak
- 3
Tomorrow, Oct 25. Cloudy. High 64°18°, low 43°6°. Typical 54°12° / 37°3°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 40°4°Dry
Afternoon
noon–6 PM
Cloudy, 63°17°Dry
Evening
6 PM–midnight
Cloudy, 52°11°Dry
Overnight
midnight–6 AM
Cloudy, 43°6°Dry
Official NWS forecast
Day: Cloudy, with a high near 64. East wind around 6 mph.
Night: A chance of rain showers after 11pm. Mostly cloudy, with a low around 43. Northeast wind around 5 mph. Chance of precipitation is 40%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 58°14°–64°18°
- Low, likely
- 39°4°–43°6°
- Typical high / low
- 54°12° / 37°3°
- Wind
- 13 mph21 km/h, gusts 22 mph36 km/h
- UV peak
- 3
Monday, Oct 26. Showers. High 61°16°, low 41°5°. Typical 54°12° / 37°3°. Rain 0.07 in1.8 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 42°6°30% chance · 0.04 in1 mm
Afternoon
noon–6 PM
Cloudy, 55°13°30% chance · 0.01 in0.3 mm
Evening
6 PM–midnight
Cloudy, 48°9°Dry
Overnight
midnight–6 AM
Cloudy, 43°6°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers before 5pm. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.
Night: Mostly cloudy, with a low around 41.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 50°10°–61°16°
- Low, likely
- 39°4°–43°6°
- Typical high / low
- 54°12° / 37°3°
- Wind
- 7 mph11 km/h, gusts 14 mph23 km/h
- UV peak
- 2
Tuesday, Oct 27. Mostly cloudy. High 58°14°, low 39°4°. Typical 53°12° / 36°2°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 42°6°Dry
Afternoon
noon–6 PM
Sunny, 53°11°Dry
Evening
6 PM–midnight
Mostly clear, 46°8°Dry
Overnight
midnight–6 AM
Partly cloudy, 39°4°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 58.
Night: A chance of rain showers after 11pm. Mostly cloudy, with a low around 39. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 49°9°–58°14°
- Low, likely
- 37°3°–43°6°
- Typical high / low
- 53°12° / 36°2°
- Wind
- 10 mph16 km/h, gusts 26 mph42 km/h
Wednesday, Oct 28. Showers. High 56°13°, low 36°2°. Typical 53°12° / 36°2°. Rain 0.08 in2 mm, 50% chance. Mostly agree.
Morning
6 AM–noon
Drizzle, 39°4°30% chance · 0.03 in0.8 mm
Afternoon
noon–6 PM
Mostly sunny, 50°10°30% chance · 0.02 in0.5 mm
Evening
6 PM–midnight
Drizzle, 42°6°30% chance · 0.07 in1.8 mm
Overnight
midnight–6 AM
Drizzle, 38°3°40% chance · 0.4 in1 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Mostly cloudy, with a high near 56. Chance of precipitation is 50%.
Night: A chance of rain showers. Mostly cloudy, with a low around 36. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 48°9°–56°13°
- Low, likely
- 34°1°–39°4°
- Typical high / low
- 53°12° / 36°2°
- Wind
- 12 mph19 km/h
- UV peak
- 3
Thursday, Oct 29. Showers. High 54°12°, low 33°1°. Typical 52°11° / 36°2°. Rain 0.23 in5.8 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 37°3°40% chance · 0.3 in0.8 cm
Afternoon
noon–6 PM
Cloudy, 47°8°30% chance
Evening
6 PM–midnight
Partly cloudy, 39°4°Dry
Overnight
midnight–6 AM
Cloudy, 35°2°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 54. Chance of precipitation is 40%.
Night: A chance of rain showers before 11pm. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 43°6°–54°12°
- Low, likely
- 31°−1°–38°3°
- Typical high / low
- 52°11° / 36°2°
- Wind
- 9 mph14 km/h, gusts 15 mph23 km/h
- UV peak
- 2
Friday, Oct 30. Mostly cloudy. High 54°12°, low 34°1°. Typical 51°11° / 35°2°. Dry. Forecasts differ.
Morning
6 AM–noon
Snow, 36°2°Dry
Afternoon
noon–6 PM
Drizzle, 44°7°Dry
Evening
6 PM–midnight
Cloudy, 39°4°Dry
Overnight
midnight–6 AM
Cloudy, 34°1°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 54.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 41°5°–54°12°
- Low, likely
- 30°−1°–38°3°
- Typical high / low
- 51°11° / 35°2°
- Wind
- 6 mph9 km/h
- UV peak
- 2
Saturday, Oct 31. Cloudy. High 44°7°, low 31°−1°. Typical 51°11° / 35°2°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly sunny, 33°1°Dry
Afternoon
noon–6 PM
Sunny, 44°7°Dry
Evening
6 PM–midnight
Clear, 36°2°Dry
Overnight
midnight–6 AM
Clear, 31°−1°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 42°6°–48°9°
- Low, likely
- 27°−3°–33°1°
- Typical high / low
- 51°11° / 35°2°
- Wind
- 5 mph8 km/h, gusts 11 mph18 km/h
- UV peak
- 3
Sunday, Nov 1. Cloudy. High 44°7°, low 30°−1°. Typical 50°10° / 35°2°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 31°0°Dry
Afternoon
noon–6 PM
Sunny, 44°7°Dry
Evening
6 PM–midnight
Clear, 37°3°Dry
Overnight
midnight–6 AM
Clear, 30°−1°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 42°6°–49°9°
- Low, likely
- 26°−3°–33°1°
- Typical high / low
- 50°10° / 35°2°
- Wind
- 6 mph10 km/h, gusts 13 mph22 km/h
- UV peak
- 3
Monday, Nov 2. Sunny. High 45°7°, low 31°−1°. Typical 50°10° / 35°2°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 33°1°Dry
Afternoon
noon–6 PM
Sunny, 44°7°Dry
Evening
6 PM–midnight
Clear, 36°2°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 41°5°–52°11°
- Low, likely
- 28°−2°–33°1°
- Typical high / low
- 50°10° / 35°2°
- Wind
- 5 mph8 km/h
- UV peak
- 3
The outlook
Today
Dry, high 59°, low 34°.
Tomorrow
Dry, high 64°, low 43°, warming up.
Monday
44% chance of rain, high 61°, low 41°, cooling off.
Rest of week
Highs 44–58°; chance of precipitation on Wednesday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (OTX) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view
Rivers
NOAA river gauges within 25 mi
Sanpoil River above Jack Creek
18 mi- Level
- 2.1 ft
- Flow
- 20 cfs
Reading from Sat 1:45 AM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 76% less heating than a typical week.
This week 33Typical 142
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 23
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at.
Comfort
Dry air outside (dew point 18°F).
Open the windows?
Sun, 2:00 PM–5:00 PM
Good stretch to open the windows (air quality forecast not available for part of this window).
Is this typical?
Coulee Dam 1 SW · official normals 1991–2020 · records 1934–2026
Oct 24, today vs a typical year
Today’s expected high is 4°2° warmer than typical.
- Normal high / low
- 55°13° / 37°3°
- Forecast high / low
- 59°15° / 34°1°
- Record high
- 74°23° in 1936
- Record low
- 23°−5° in 2002
Last 7 days vs normal
On average 5°3° warmer than normal (daily mean temperature).
- +1°SunOct 18
- +3°+1°MonOct 19
- +4°+2°TueOct 20
- +5°+3°WedOct 21
- +5°+3°ThuOct 22
- +13°+7°FriOct 23
- —SatOct 24
Grand Coulee weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:28 AM, sunset 5:50 PM.
- Daylight
- 10 h 22 min
- Losing 3 min 17 s a day; shortest Dec 21, 1 h 59 min less
- Golden hour
- 5:06–6:10 PM
- Morning 7:09–8:12 AM
- Blue hour
- 6:10–6:22 PM
- Morning 6:57–7:09 AM; first light 6:57 AM
Stars tonight? Fair
Mostly clear 3:13–5 AM, but the moon is 96% lit and up.
Moon
Waxing gibbous
96% lit · growing
- Today
- sets 5:44 AM · rises 4:52 PM
- Full moon
- Oct 25
- New moon
- Nov 8
