Monthly outlook for Umtanum, WA: average high 50°, average low 38.2°. That is 1° below the climate normal for October. Precipitation is expected on 11 days (about 2.1 inches), against a normal of 5 days and 1.0 inches. The warmest day looks like 7 November (55.8°), the coolest 31 October (32.4°).
50°/38.2°
Average high / low
−1°
Below normal
11 / 5
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
49.4°
53.2°
-2.1°
4 November – 13 November
50.9°
48.8°
+1.2°
14 November – 23 November
at normal
44.1°
—
October records over 66 years
87.8°6 October 2014All-time high
17.6°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Hillside Siding (9 mi).
Mon, 2653° / 37°0.05
53 °
Umtanum, Monday, 26 October
Light rain. High 53°, low 37°.
Pressure30.03 inHg
Wind1.9 mph E
Humidity73%
Visibility6.2 mi
Dew point41°
Tue, 2753° / 40°0.18
53 °
Umtanum, Tuesday, 27 October
Rain. High 53°, low 40°.
Pressure29.97 inHg
Wind1.3 mph SE
Humidity68%
Visibility6.2 mi
Dew point40°
Wed, 2851° / 35°0.14
51 °
Umtanum, Wednesday, 28 October
Light rain. High 51°, low 35°.
Pressure29.94 inHg
Wind1.9 mph SW
Humidity66%
Visibility6.2 mi
Dew point36°
Thu, 2949° / 33°0
49 °
Umtanum, Thursday, 29 October
Mostly clear. High 49°, low 33°.
Pressure30.00 inHg
Wind5.6 mph SE
Humidity64%
Visibility6.2 mi
Dew point34°
Fri, 3047° / 35°0.12
47 °
Umtanum, Friday, 30 October
Light rain. High 47°, low 35°.
Pressure30.00 inHg
Wind1.2 mph SW
Humidity77%
Visibility—
Dew point33°
Sat, 3149° / 32°0
49 °
Umtanum, Saturday, 31 October
Overcast. High 49°, low 32°.
Pressure30.03 inHg
Wind7 mph E
Humidity68%
Visibility—
Dew point31°
Sun, 0152° / 37°0.19
52 °
Umtanum, Sunday, 1 November
Rain. High 52°, low 37°.
Pressure29.94 inHg
Wind17.3 mph NW
Humidity61%
Visibility—
Dew point34°
Mon, 0249° / 33°0
49 °
Umtanum, Monday, 2 November
Partly cloudy. High 49°, low 33°.
Pressure30.18 inHg
Wind7.4 mph E
Humidity60%
Visibility—
Dew point28°
Tue, 0343° / 35°0.04
43 °
Umtanum, Tuesday, 3 November
Light rain. High 43°, low 35°.
Pressure30.00 inHg
Wind5.5 mph N
Humidity56%
Visibility—
Dew point28°
Wed, 0442° / 39°0.61
42 °
Umtanum, Wednesday, 4 November
Rain. High 42°, low 39°.
Pressure29.97 inHg
Wind3 mph NE
Humidity92%
Visibility—
Dew point38°
Thu, 0554° / 43°0.31
54 °
Umtanum, Thursday, 5 November
Light rain. High 54°, low 43°.
Pressure29.71 inHg
Wind3.5 mph N
Humidity96%
Visibility—
Dew point46°
Fri, 0653° / 42°0.16
53 °
Umtanum, Friday, 6 November
Rain. High 53°, low 42°.
Pressure29.68 inHg
Wind4.1 mph SE
Humidity74%
Visibility—
Dew point41°
Sat, 0756° / 43°0.01
56 °
Umtanum, Saturday, 7 November
Light rain. High 56°, low 43°.
Pressure29.94 inHg
Wind4.1 mph N
Humidity77%
Visibility—
Dew point43°
Sun, 0855° / 45°0
55 °
Umtanum, Sunday, 8 November
Overcast. High 55°, low 45°.
Pressure29.94 inHg
Wind6.5 mph NW
Humidity68%
Visibility—
Dew point41°
Mon, 0946° / 44°0.2
46 °
Umtanum, Monday, 9 November
Rain. High 46°, low 44°.
Pressure29.91 inHg
Wind3.9 mph N
Humidity85%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1048° / 33°0.06
48 °
Umtanum, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation28%
Record high63° (1989)
Record low9° (1986)
Wed, 1148° / 33°0.06
48 °
Umtanum, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation35%
Record high63° (1990)
Record low1° (1985)
Thu, 1248° / 33°0.08
48 °
Umtanum, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.08 in
Chance of precipitation25%
Record high65° (1999)
Record low-3° (1985)
Fri, 1347° / 34°0.09
47 °
Umtanum, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.09 in
Chance of precipitation37%
Record high64° (1999)
Record low12° (1985)
Sat, 1447° / 34°0.06
47 °
Umtanum, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.06 in
Chance of precipitation22%
Record high62° (2021)
Record low10° (1964)
Sun, 1547° / 34°0.06
47 °
Umtanum, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.06 in
Chance of precipitation32%
Record high58° (2021)
Record low13° (1964)
Mon, 1646° / 34°0.06
46 °
Umtanum, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.06 in
Chance of precipitation37%
Record high61° (1976)
Record low17° (1964)
Tue, 1746° / 33°0.08
46 °
Umtanum, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.08 in
Chance of precipitation42%
Record high61° (1976)
Record low17° (1987)
Wed, 1845° / 31°0.05
45 °
Umtanum, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.05 in
Chance of precipitation27%
Record high57° (2008)
Record low14° (1994)
Thu, 1944° / 31°0.12
44 °
Umtanum, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.12 in
Chance of precipitation50%
Record high56° (1989)
Record low-5° (1985)
Fri, 2044° / 31°0.09
44 °
Umtanum, Friday, 20 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.09 in
Chance of precipitation33%
Record high54° (1971)
Record low10° (1985)
Sat, 2142° / 29°0.07
42 °
Umtanum, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation32%
Record high54° (1989)
Record low1° (1985)
Sun, 2241° / 28°0.09
41 °
Umtanum, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.09 in
Chance of precipitation37%
Record high54° (1990)
Record low6° (1985)
Mon, 2340° / 28°0.08
40 °
Umtanum, Monday, 23 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.08 in
Chance of precipitation43%
Record high55° (2017)
Record low-14° (1985)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Umtanum, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Umtanum, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.