Monthly outlook for Fairfield, ID: average high 58.5°, average low 40°. That is 0.6° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 9 October (79.3°), the coolest 13 October (32.1°).
58.5°/40°
Average high / low
+0.6°
Above normal
4 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
55.9°
58.5°
-1.4°
19 October – 28 October
62.8°
53.9°
+4.9°
29 October – 7 November
at normal
47.5°
—
October records over 66 years
84.7°2 October 2010All-time high
-4.4°27 October 1970All-time low
Sat, 1062° / 39°0.02
62 °
Fairfield, Saturday, 10 October
Light rain. High 62°, low 39°.
Pressure29.56 inHg
Wind4.9 mph S
Humidity40%
Visibility6.2 mi
Dew point35°
Sun, 1147° / 41°0.2
47 °
Fairfield, Sunday, 11 October
Light rain. High 47°, low 41°.
Pressure29.65 inHg
Wind5.1 mph SE
Humidity74%
Visibility6.2 mi
Dew point37°
Mon, 1244° / 36°0.24
44 °
Fairfield, Monday, 12 October
Snow. High 44°, low 36°.
Pressure29.94 inHg
Wind3.9 mph SE
Humidity100%
Visibility0.2 mi
Dew point36°
Tue, 1346° / 32°0.1
46 °
Fairfield, Tuesday, 13 October
Light rain. High 46°, low 32°.
Pressure29.97 inHg
Wind4.4 mph N
Humidity77%
Visibility—
Dew point37°
Wed, 1460° / 33°0
60 °
Fairfield, Wednesday, 14 October
Clear. High 60°, low 33°.
Pressure29.97 inHg
Wind15.4 mph NW
Humidity39%
Visibility—
Dew point28°
Thu, 1552° / 39°0.07
52 °
Fairfield, Thursday, 15 October
Light rain. High 52°, low 39°.
Pressure30.00 inHg
Wind13.1 mph NW
Humidity38%
Visibility—
Dew point26°
Fri, 1652° / 34°0
52 °
Fairfield, Friday, 16 October
Clear. High 52°, low 34°.
Pressure30.47 inHg
Wind7.6 mph S
Humidity39%
Visibility—
Dew point20°
Sat, 1757° / 37°0
57 °
Fairfield, Saturday, 17 October
Overcast. High 57°, low 37°.
Pressure30.33 inHg
Wind5.7 mph S
Humidity29%
Visibility—
Dew point18°
Sun, 1860° / 43°0
60 °
Fairfield, Sunday, 18 October
Partly cloudy. High 60°, low 43°.
Pressure30.21 inHg
Wind6.6 mph SE
Humidity23%
Visibility—
Dew point17°
Mon, 1962° / 42°0
62 °
Fairfield, Monday, 19 October
Clear. High 62°, low 42°.
Pressure30.15 inHg
Wind9.6 mph SW
Humidity24%
Visibility—
Dew point18°
Tue, 2062° / 41°0
62 °
Fairfield, Tuesday, 20 October
Mostly clear. High 62°, low 41°.
Pressure30.09 inHg
Wind6.4 mph S
Humidity20%
Visibility—
Dew point14°
Wed, 2164° / 44°0
64 °
Fairfield, Wednesday, 21 October
Clear. High 64°, low 44°.
Pressure30.09 inHg
Wind11.1 mph SW
Humidity20%
Visibility—
Dew point16°
Thu, 2262° / 42°0
62 °
Fairfield, Thursday, 22 October
Clear. High 62°, low 42°.
Pressure30.24 inHg
Wind5.1 mph SE
Humidity23%
Visibility—
Dew point19°
Fri, 2365° / 45°0
65 °
Fairfield, Friday, 23 October
Clear. High 65°, low 45°.
Pressure30.09 inHg
Wind5.9 mph S
Humidity24%
Visibility—
Dew point21°
Sat, 2462° / 46°0
62 °
Fairfield, Saturday, 24 October
Clear. High 62°, low 46°.
Pressure30.06 inHg
Wind6 mph N
Humidity21%
Visibility—
Dew point20°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2553° / 33°0.08
53 °
Fairfield, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.08 in
Chance of precipitation23%
Record high67° (1977)
Record low5° (1970)
Mon, 2652° / 32°0.07
52 °
Fairfield, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low32°
Average precipitation0.07 in
Chance of precipitation23%
Record high65° (1999)
Record low16° (1970)
Tue, 2751° / 30°0.02
51 °
Fairfield, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low30°
Average precipitation0.02 in
Chance of precipitation18%
Record high66° (2003)
Record low-4° (1970)
Wed, 2850° / 31°0.05
50 °
Fairfield, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (2008)
Record low-3° (1970)
Thu, 2949° / 30°0.05
49 °
Fairfield, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.05 in
Chance of precipitation27%
Record high66° (1962)
Record low7° (1970)
Fri, 3048° / 29°0.04
48 °
Fairfield, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation20%
Record high65° (1962)
Record low-4° (1991)
Sat, 3148° / 29°0.02
48 °
Fairfield, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.02 in
Chance of precipitation13%
Record high65° (1988)
Record low6° (1991)
Sun, 0148° / 29°0.04
48 °
Fairfield, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation20%
Record high65° (1965)
Record low6° (1984)
Mon, 0247° / 29°0.06
47 °
Fairfield, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.06 in
Chance of precipitation25%
Record high63° (2020)
Record low3° (1961)
Tue, 0348° / 28°0.04
48 °
Fairfield, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.04 in
Chance of precipitation17%
Record high64° (2020)
Record low-4° (1991)
Wed, 0447° / 29°0.05
47 °
Fairfield, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.05 in
Chance of precipitation20%
Record high64° (2020)
Record low9° (1961)
Thu, 0547° / 28°0.06
47 °
Fairfield, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.06 in
Chance of precipitation20%
Record high64° (1980)
Record low3° (1961)
Fri, 0646° / 29°0.07
46 °
Fairfield, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.07 in
Chance of precipitation30%
Record high64° (1999)
Record low2° (1971)
Sat, 0746° / 29°0.06
46 °
Fairfield, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.06 in
Chance of precipitation35%
Record high63° (1999)
Record low14° (1991)
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 Fairfield, ID 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 Fairfield, ID 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.