Monthly outlook for Gilliam, WA: average high 60.3°, average low 45.9°. That is 2.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.2 inches), against a normal of 7 days and 2.0 inches. The warmest day looks like 21 October (66.5°), the coolest 24 October (38.4°).
60.3°/45.9°
Average high / low
+2.9°
Above normal
3 / 7
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
60.6°
56.8°
+2.1°
30 October – 8 November
59.8°
51.6°
+4.5°
9 November – 18 November
at normal
48°
—
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).
Wed, 2167° / 42°0
67 °
Gilliam, Wednesday, 21 October
Overcast. High 67°, low 42°.
Pressure29.97 inHg
Wind2.2 mph W
Humidity39%
Visibility6.2 mi
Dew point37°
Thu, 2263° / 52°0.06
63 °
Gilliam, Thursday, 22 October
Light rain. High 63°, low 52°.
Pressure29.85 inHg
Wind4 mph SW
Humidity57%
Visibility6.2 mi
Dew point43°
Fri, 2357° / 46°0
57 °
Gilliam, Friday, 23 October
Clear. High 57°, low 46°.
Pressure30.21 inHg
Wind11.1 mph SW
Humidity47%
Visibility6.2 mi
Dew point32°
Sat, 2463° / 38°0
63 °
Gilliam, Saturday, 24 October
Partly cloudy. High 63°, low 38°.
Pressure30.18 inHg
Wind4.4 mph SE
Humidity37%
Visibility—
Dew point29°
Sun, 2563° / 44°0
63 °
Gilliam, Sunday, 25 October
Overcast. High 63°, low 44°.
Pressure30.27 inHg
Wind5.9 mph SE
Humidity42%
Visibility—
Dew point31°
Mon, 2657° / 43°0
57 °
Gilliam, Monday, 26 October
Clear. High 57°, low 43°.
Pressure30.30 inHg
Wind5.7 mph NW
Humidity40%
Visibility—
Dew point27°
Tue, 2756° / 42°0
56 °
Gilliam, Tuesday, 27 October
Overcast. High 56°, low 42°.
Pressure30.33 inHg
Wind5.6 mph NW
Humidity38%
Visibility—
Dew point25°
Wed, 2857° / 43°0
57 °
Gilliam, Wednesday, 28 October
Clear. High 57°, low 43°.
Pressure30.18 inHg
Wind5.2 mph NW
Humidity40%
Visibility—
Dew point28°
Thu, 2959° / 45°0
59 °
Gilliam, Thursday, 29 October
Clear. High 59°, low 45°.
Pressure29.94 inHg
Wind5.1 mph NW
Humidity38%
Visibility—
Dew point29°
Fri, 3058° / 47°0
58 °
Gilliam, Friday, 30 October
Overcast. High 58°, low 47°.
Pressure29.83 inHg
Wind5.8 mph S
Humidity38%
Visibility—
Dew point29°
Sat, 3160° / 49°0.04
60 °
Gilliam, Saturday, 31 October
Light rain. High 60°, low 49°.
Pressure29.80 inHg
Wind6.8 mph SE
Humidity40%
Visibility—
Dew point31°
Sun, 0159° / 52°0.08
59 °
Gilliam, Sunday, 1 November
Light rain. High 59°, low 52°.
Pressure30.03 inHg
Wind10.5 mph SW
Humidity53%
Visibility—
Dew point41°
Mon, 0260° / 51°0
60 °
Gilliam, Monday, 2 November
Overcast. High 60°, low 51°.
Pressure30.24 inHg
Wind7.6 mph E
Humidity51%
Visibility—
Dew point38°
Tue, 0363° / 49°0
63 °
Gilliam, Tuesday, 3 November
Overcast. High 63°, low 49°.
Pressure30.03 inHg
Wind5.9 mph NW
Humidity53%
Visibility—
Dew point39°
Wed, 0459° / 50°0
59 °
Gilliam, Wednesday, 4 November
Overcast. High 59°, low 50°.
Pressure29.65 inHg
Wind5.1 mph S
Humidity54%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0552° / 37°0.17
52 °
Gilliam, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.17 in
Chance of precipitation52%
Record high67° (1975)
Record low20° (2003)
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)
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.