Monthly outlook for Poston, AZ: average high 82.8°, average low 66.1°. That is 1° below the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 1 days and 0.2 inches. The warmest day looks like 21 October (91.7°), the coolest 31 October (56.2°).
82.8°/66.1°
Average high / low
−1°
Below normal
1 / 1
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
85.7°
86.3°
-0.3°
27 October – 5 November
77.8°
81.3°
-1.9°
6 November – 15 November
at normal
77.3°
—
October records over 66 years
111.9°1 October 2024All-time high
33.1°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — Big River (10 mi).
Sun, 1886° / 71°0
86 °
Poston, Sunday, 18 October
Clear. High 86°, low 71°.
Pressure30.00 inHg
Wind4.9 mph SE
Humidity25%
Visibility6.2 mi
Dew point45°
Mon, 1989° / 67°0
89 °
Poston, Monday, 19 October
Clear. High 89°, low 67°.
Pressure29.88 inHg
Wind1.8 mph E
Humidity27%
Visibility6.2 mi
Dew point49°
Tue, 2091° / 66°0
91 °
Poston, Tuesday, 20 October
Clear. High 91°, low 66°.
Pressure29.85 inHg
Wind3.1 mph SE
Humidity23%
Visibility6.2 mi
Dew point47°
Wed, 2192° / 70°0
92 °
Poston, Wednesday, 21 October
Partly cloudy. High 92°, low 70°.
Pressure29.83 inHg
Wind14.6 mph S
Humidity33%
Visibility—
Dew point52°
Thu, 2284° / 69°0.06
84 °
Poston, Thursday, 22 October
Light rain. High 84°, low 69°.
Pressure29.88 inHg
Wind8.7 mph NW
Humidity56%
Visibility—
Dew point60°
Fri, 2378° / 63°0
78 °
Poston, Friday, 23 October
Clear. High 78°, low 63°.
Pressure30.00 inHg
Wind11.8 mph W
Humidity37%
Visibility—
Dew point44°
Sat, 2483° / 65°0
83 °
Poston, Saturday, 24 October
Clear. High 83°, low 65°.
Pressure30.00 inHg
Wind3.4 mph NW
Humidity28%
Visibility—
Dew point40°
Sun, 2586° / 67°0
86 °
Poston, Sunday, 25 October
Overcast. High 86°, low 67°.
Pressure29.83 inHg
Wind9.6 mph SW
Humidity23%
Visibility—
Dew point38°
Mon, 2686° / 69°0
86 °
Poston, Monday, 26 October
Partly cloudy. High 86°, low 69°.
Pressure29.74 inHg
Wind15.3 mph N
Humidity21%
Visibility—
Dew point37°
Tue, 2786° / 67°0
86 °
Poston, Tuesday, 27 October
Clear. High 86°, low 67°.
Pressure29.85 inHg
Wind4.9 mph S
Humidity21%
Visibility—
Dew point35°
Wed, 2884° / 69°0
84 °
Poston, Wednesday, 28 October
Overcast. High 84°, low 69°.
Pressure30.00 inHg
Wind8.9 mph S
Humidity30%
Visibility—
Dew point43°
Thu, 2983° / 68°0
83 °
Poston, Thursday, 29 October
Overcast. High 83°, low 68°.
Pressure29.83 inHg
Wind14.9 mph S
Humidity29%
Visibility—
Dew point43°
Fri, 3073° / 60°0
73 °
Poston, Friday, 30 October
Clear. High 73°, low 60°.
Pressure29.91 inHg
Wind14 mph N
Humidity17%
Visibility—
Dew point22°
Sat, 3171° / 56°0
71 °
Poston, Saturday, 31 October
Overcast. High 71°, low 56°.
Pressure29.88 inHg
Wind5 mph NW
Humidity13%
Visibility—
Dew point13°
Sun, 0171° / 58°0
71 °
Poston, Sunday, 1 November
Overcast. High 71°, low 58°.
Pressure29.83 inHg
Wind16.7 mph SW
Humidity38%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0281° / 55°0
81 °
Poston, Monday, 2 November
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0 in
Chance of precipitation5%
Record high95° (2020)
Record low41° (1971)
Tue, 0381° / 54°0
81 °
Poston, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0 in
Chance of precipitation5%
Record high92° (2020)
Record low44° (2004)
Wed, 0481° / 55°0
81 °
Poston, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high81°
Average low55°
Average precipitation0 in
Chance of precipitation0%
Record high94° (2020)
Record low45° (2004)
Thu, 0581° / 54°0.02
81 °
Poston, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high81°
Average low54°
Average precipitation0.02 in
Chance of precipitation3%
Record high96° (2020)
Record low44° (2002)
Fri, 0680° / 55°0
80 °
Poston, Friday, 6 November
Climate normal for this date — 60-year average.
Average high80°
Average low55°
Average precipitation0 in
Chance of precipitation2%
Record high91° (1988)
Record low44° (2011)
Sat, 0779° / 55°0.02
79 °
Poston, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high79°
Average low55°
Average precipitation0.02 in
Chance of precipitation3%
Record high91° (2007)
Record low43° (2011)
Sun, 0878° / 54°0.02
78 °
Poston, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high78°
Average low54°
Average precipitation0.02 in
Chance of precipitation3%
Record high92° (2016)
Record low43° (2000)
Mon, 0978° / 53°0
78 °
Poston, Monday, 9 November
Climate normal for this date — 60-year average.
Average high78°
Average low53°
Average precipitation0 in
Chance of precipitation2%
Record high89° (2025)
Record low42° (1986)
Tue, 1077° / 52°0.01
77 °
Poston, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high77°
Average low52°
Average precipitation0.01 in
Chance of precipitation3%
Record high89° (2025)
Record low41° (1998)
Wed, 1177° / 52°0.02
77 °
Poston, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high77°
Average low52°
Average precipitation0.02 in
Chance of precipitation8%
Record high88° (2013)
Record low42° (2020)
Thu, 1277° / 52°0.02
77 °
Poston, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high77°
Average low52°
Average precipitation0.02 in
Chance of precipitation7%
Record high91° (1967)
Record low41° (1982)
Fri, 1376° / 51°0.01
76 °
Poston, Friday, 13 November
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.01 in
Chance of precipitation3%
Record high90° (1999)
Record low38° (2000)
Sat, 1476° / 51°0.02
76 °
Poston, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high76°
Average low51°
Average precipitation0.02 in
Chance of precipitation7%
Record high89° (1999)
Record low38° (2000)
Sun, 1575° / 51°0.02
75 °
Poston, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high75°
Average low51°
Average precipitation0.02 in
Chance of precipitation10%
Record high89° (1999)
Record low37° (1964)
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 Poston, AZ 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 Poston, AZ 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.