Monthly outlook for Fairfield, ID: average high 57.1°, average low 36.8°. That is 0.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 19 October (68.2°), the coolest 14 October (28.9°).
57.1°/36.8°
Average high / low
+0.4°
Above normal
2 / 3
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
57.9°
57.8°
+0°
21 October – 30 October
55.8°
52.2°
+2°
31 October – 9 November
at normal
46.5°
—
October records over 66 years
84.7°2 October 2010All-time high
-4.4°27 October 1970All-time low
Mon, 1249° / 36°0.1
49 °
Fairfield, Monday, 12 October
Light rain. High 49°, low 36°.
Pressure29.91 inHg
Wind1.7 mph S
Humidity93%
Visibility5.2 mi
Dew point36°
Tue, 1352° / 32°0
52 °
Fairfield, Tuesday, 13 October
Mostly clear. High 52°, low 32°.
Pressure30.00 inHg
Wind4.2 mph S
Humidity56%
Visibility6.2 mi
Dew point30°
Wed, 1458° / 29°0
58 °
Fairfield, Wednesday, 14 October
Clear. High 58°, low 29°.
Pressure30.15 inHg
Wind3.9 mph S
Humidity49%
Visibility1.1 mi
Dew point28°
Thu, 1560° / 33°0
60 °
Fairfield, Thursday, 15 October
Clear. High 60°, low 33°.
Pressure30.42 inHg
Wind3 mph S
Humidity38%
Visibility6.2 mi
Dew point29°
Fri, 1664° / 38°0
64 °
Fairfield, Friday, 16 October
Clear. High 64°, low 38°.
Pressure30.42 inHg
Wind8.6 mph SE
Humidity31%
Visibility—
Dew point27°
Sat, 1767° / 40°0
67 °
Fairfield, Saturday, 17 October
Mostly clear. High 67°, low 40°.
Pressure30.18 inHg
Wind8.3 mph SW
Humidity33%
Visibility—
Dew point29°
Sun, 1867° / 48°0
67 °
Fairfield, Sunday, 18 October
Overcast. High 67°, low 48°.
Pressure30.03 inHg
Wind7 mph SW
Humidity23%
Visibility—
Dew point22°
Mon, 1968° / 48°0
68 °
Fairfield, Monday, 19 October
Clear. High 68°, low 48°.
Pressure29.91 inHg
Wind12.4 mph SW
Humidity26%
Visibility—
Dew point26°
Tue, 2048° / 36°0.02
48 °
Fairfield, Tuesday, 20 October
Light rain. High 48°, low 36°.
Pressure30.06 inHg
Wind15.5 mph W
Humidity53%
Visibility—
Dew point26°
Wed, 2153° / 32°0
53 °
Fairfield, Wednesday, 21 October
Partly cloudy. High 53°, low 32°.
Pressure29.91 inHg
Wind7.5 mph W
Humidity28%
Visibility—
Dew point15°
Thu, 2249° / 35°0
49 °
Fairfield, Thursday, 22 October
Partly cloudy. High 49°, low 35°.
Pressure30.06 inHg
Wind13.3 mph W
Humidity48%
Visibility—
Dew point26°
Fri, 2352° / 34°0
52 °
Fairfield, Friday, 23 October
Mostly clear. High 52°, low 34°.
Pressure30.39 inHg
Wind7.9 mph SW
Humidity41%
Visibility—
Dew point22°
Sat, 2455° / 33°0
55 °
Fairfield, Saturday, 24 October
Clear. High 55°, low 33°.
Pressure30.45 inHg
Wind8.3 mph S
Humidity21%
Visibility—
Dew point10°
Sun, 2561° / 37°0
61 °
Fairfield, Sunday, 25 October
Clear. High 61°, low 37°.
Pressure30.27 inHg
Wind7.4 mph S
Humidity20%
Visibility—
Dew point12°
Mon, 2664° / 39°0
64 °
Fairfield, Monday, 26 October
Partly cloudy. High 64°, low 39°.
Pressure30.18 inHg
Wind9.8 mph W
Humidity23%
Visibility—
Dew point17°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 0844° / 27°0.06
44 °
Fairfield, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low27°
Average precipitation0.06 in
Chance of precipitation32%
Record high60° (1976)
Record low-3° (1994)
Mon, 0943° / 27°0.07
43 °
Fairfield, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.07 in
Chance of precipitation30%
Record high59° (2019)
Record low6° (1998)
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.