Monthly outlook for Gilliam, WA: average high 59.8°, average low 44.4°. That is 2.9° above the climate normal for October. Precipitation is expected on 6 days (about 0.7 inches), against a normal of 7 days and 2.1 inches. The warmest day looks like 21 October (66.4°), the coolest 22 October (39.9°).
59.8°/44.4°
Average high / low
+2.9°
Above normal
6 / 7
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
61.2°
56.1°
+2.8°
31 October – 9 November
57.5°
51.3°
+3.5°
10 November – 19 November
at normal
47.6°
—
October records over 66 years
88.3°2 October 1975All-time high
10.6°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Kooskooskie (9 mi).
Thu, 2260° / 40°0.07
60 °
Gilliam, Thursday, 22 October
Light rain. High 60°, low 40°.
Pressure29.85 inHg
Wind0.5 mph W
Humidity70%
Visibility3.5 mi
Dew point44°
Fri, 2360° / 47°0.01
60 °
Gilliam, Friday, 23 October
Light rain. High 60°, low 47°.
Pressure30.12 inHg
Wind12.6 mph SW
Humidity44%
Visibility6.2 mi
Dew point33°
Sat, 2461° / 42°0
61 °
Gilliam, Saturday, 24 October
Clear. High 61°, low 42°.
Pressure30.18 inHg
Wind2.6 mph W
Humidity39%
Visibility6.2 mi
Dew point31°
Sun, 2562° / 44°0
62 °
Gilliam, Sunday, 25 October
Partly cloudy. High 62°, low 44°.
Pressure30.15 inHg
Wind2.9 mph NW
Humidity50%
Visibility—
Dew point36°
Mon, 2666° / 45°0
66 °
Gilliam, Monday, 26 October
Partly cloudy. High 66°, low 45°.
Pressure30.12 inHg
Wind5.1 mph N
Humidity52%
Visibility—
Dew point38°
Tue, 2760° / 49°0.09
60 °
Gilliam, Tuesday, 27 October
Light rain. High 60°, low 49°.
Pressure30.03 inHg
Wind7.5 mph W
Humidity48%
Visibility—
Dew point39°
Wed, 2859° / 46°0
59 °
Gilliam, Wednesday, 28 October
Mostly clear. High 59°, low 46°.
Pressure30.21 inHg
Wind6.3 mph NW
Humidity55%
Visibility—
Dew point38°
Thu, 2959° / 45°0
59 °
Gilliam, Thursday, 29 October
Clear. High 59°, low 45°.
Pressure30.06 inHg
Wind6 mph NW
Humidity50%
Visibility—
Dew point35°
Fri, 3059° / 46°0.06
59 °
Gilliam, Friday, 30 October
Light rain. High 59°, low 46°.
Pressure29.71 inHg
Wind17.9 mph W
Humidity37%
Visibility—
Dew point31°
Sat, 3154° / 42°0.06
54 °
Gilliam, Saturday, 31 October
Light rain. High 54°, low 42°.
Pressure29.97 inHg
Wind16.2 mph SW
Humidity59%
Visibility—
Dew point34°
Sun, 0160° / 42°0
60 °
Gilliam, Sunday, 1 November
Overcast. High 60°, low 42°.
Pressure30.03 inHg
Wind6.3 mph SE
Humidity38%
Visibility—
Dew point28°
Mon, 0260° / 46°0
60 °
Gilliam, Monday, 2 November
Overcast. High 60°, low 46°.
Pressure30.15 inHg
Wind6.7 mph SE
Humidity32%
Visibility—
Dew point25°
Tue, 0357° / 47°0
57 °
Gilliam, Tuesday, 3 November
Overcast. High 57°, low 47°.
Pressure30.03 inHg
Wind6.1 mph SE
Humidity31%
Visibility—
Dew point25°
Wed, 0463° / 48°0.29
63 °
Gilliam, Wednesday, 4 November
Rain. High 63°, low 48°.
Pressure29.83 inHg
Wind13.5 mph S
Humidity46%
Visibility—
Dew point38°
Thu, 0552° / 42°0.11
52 °
Gilliam, Thursday, 5 November
Light rain. High 52°, low 42°.
Pressure29.88 inHg
Wind18.4 mph SW
Humidity67%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0651° / 37°0.17
51 °
Gilliam, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.17 in
Chance of precipitation57%
Record high68° (2012)
Record low21° (2003)
Sat, 0751° / 37°0.19
51 °
Gilliam, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.19 in
Chance of precipitation50%
Record high66° (1999)
Record low25° (2003)
Sun, 0849° / 36°0.13
49 °
Gilliam, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.13 in
Chance of precipitation47%
Record high66° (2016)
Record low22° (1994)
Mon, 0949° / 36°0.11
49 °
Gilliam, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.11 in
Chance of precipitation52%
Record high64° (2016)
Record low19° (1986)
Tue, 1049° / 36°0.1
49 °
Gilliam, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation45%
Record high64° (1989)
Record low3° (1986)
Wed, 1149° / 35°0.13
49 °
Gilliam, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.13 in
Chance of precipitation43%
Record high67° (1990)
Record low3° (2000)
Thu, 1249° / 36°0.17
49 °
Gilliam, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.17 in
Chance of precipitation42%
Record high72° (1999)
Record low4° (1985)
Fri, 1348° / 35°0.15
48 °
Gilliam, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.15 in
Chance of precipitation57%
Record high70° (1999)
Record low5° (1985)
Sat, 1448° / 35°0.09
48 °
Gilliam, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.09 in
Chance of precipitation43%
Record high67° (1999)
Record low9° (1985)
Sun, 1549° / 35°0.1
49 °
Gilliam, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.1 in
Chance of precipitation45%
Record high65° (2021)
Record low13° (1964)
Mon, 1647° / 35°0.15
47 °
Gilliam, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.15 in
Chance of precipitation58%
Record high62° (1999)
Record low10° (1964)
Tue, 1747° / 35°0.17
47 °
Gilliam, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.17 in
Chance of precipitation58%
Record high64° (1976)
Record low6° (2000)
Wed, 1846° / 34°0.15
46 °
Gilliam, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.15 in
Chance of precipitation52%
Record high60° (2008)
Record low13° (2000)
Thu, 1946° / 33°0.14
46 °
Gilliam, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.14 in
Chance of precipitation43%
Record high60° (1989)
Record low8° (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 Gilliam, 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 Gilliam, 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.