Monthly outlook for Mammoth, MO: average high 76.8°, average low 53°. That is 3.7° above the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 13 October (90°), the coolest 18 October (33°).
76.8°/53°
Average high / low
+3.7°
Above normal
2 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
78.4°
71.2°
+4°
19 October – 28 October
74.2°
67.1°
+3.9°
29 October – 7 November
at normal
63.2°
—
October records over 66 years
92.5°11 October 1963All-time high
28.2°31 October 1993All-time low
Climate normals and records are computed from the nearest reference point — Mountain Home (14 mi).
Sat, 1085° / 56°0
85 °
Mammoth, Saturday, 10 October
Overcast. High 85°, low 56°.
Pressure30.03 inHg
Wind2.7 mph SE
Humidity51%
Visibility6.2 mi
Dew point58°
Sun, 1187° / 57°0
87 °
Mammoth, Sunday, 11 October
Clear. High 87°, low 57°.
Pressure30.00 inHg
Wind6.7 mph W
Humidity44%
Visibility6.2 mi
Dew point59°
Mon, 1287° / 65°0
87 °
Mammoth, Monday, 12 October
Clear. High 87°, low 65°.
Pressure29.97 inHg
Wind8.8 mph SW
Humidity36%
Visibility6.2 mi
Dew point55°
Tue, 1390° / 68°0
90 °
Mammoth, Tuesday, 13 October
Light rain. High 90°, low 68°.
Pressure29.94 inHg
Wind6.8 mph SW
Humidity54%
Visibility6.2 mi
Dew point68°
Wed, 1483° / 70°0.63
83 °
Mammoth, Wednesday, 14 October
Rain. High 83°, low 70°.
Pressure30.00 inHg
Wind5.7 mph NW
Humidity73%
Visibility—
Dew point70°
Thu, 1583° / 69°0.39
83 °
Mammoth, Thursday, 15 October
Rain. High 83°, low 69°.
Pressure29.94 inHg
Wind8.5 mph W
Humidity71%
Visibility—
Dew point71°
Fri, 1665° / 53°0
65 °
Mammoth, Friday, 16 October
Overcast. High 65°, low 53°.
Pressure30.27 inHg
Wind13 mph NW
Humidity33%
Visibility—
Dew point34°
Sat, 1757° / 40°0
57 °
Mammoth, Saturday, 17 October
Clear. High 57°, low 40°.
Pressure30.45 inHg
Wind13.9 mph N
Humidity32%
Visibility—
Dew point25°
Sun, 1859° / 33°0
59 °
Mammoth, Sunday, 18 October
Mostly clear. High 59°, low 33°.
Pressure30.45 inHg
Wind4.7 mph E
Humidity31%
Visibility—
Dew point23°
Mon, 1966° / 37°0
66 °
Mammoth, Monday, 19 October
Clear. High 66°, low 37°.
Pressure30.36 inHg
Wind4.8 mph SE
Humidity27%
Visibility—
Dew point25°
Tue, 2071° / 43°0
71 °
Mammoth, Tuesday, 20 October
Clear. High 71°, low 43°.
Pressure30.36 inHg
Wind4 mph SE
Humidity24%
Visibility—
Dew point28°
Wed, 2174° / 46°0
74 °
Mammoth, Wednesday, 21 October
Clear. High 74°, low 46°.
Pressure30.30 inHg
Wind4.1 mph S
Humidity27%
Visibility—
Dew point33°
Thu, 2278° / 48°0
78 °
Mammoth, Thursday, 22 October
Clear. High 78°, low 48°.
Pressure30.18 inHg
Wind3.4 mph S
Humidity26%
Visibility—
Dew point35°
Fri, 2378° / 51°0
78 °
Mammoth, Friday, 23 October
Clear. High 78°, low 51°.
Pressure30.06 inHg
Wind6.2 mph S
Humidity25%
Visibility—
Dew point35°
Sat, 2478° / 52°0
78 °
Mammoth, Saturday, 24 October
Overcast. High 78°, low 52°.
Pressure30.06 inHg
Wind8.1 mph S
Humidity23%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2565° / 50°0.09
65 °
Mammoth, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high65°
Average low50°
Average precipitation0.09 in
Chance of precipitation33%
Record high81° (1963)
Record low38° (1982)
Mon, 2666° / 50°0.1
66 °
Mammoth, Monday, 26 October
Climate normal for this date — 60-year average.
Average high66°
Average low50°
Average precipitation0.1 in
Chance of precipitation37%
Record high83° (2014)
Record low39° (1972)
Tue, 2765° / 49°0.13
65 °
Mammoth, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.13 in
Chance of precipitation32%
Record high83° (2023)
Record low38° (2012)
Wed, 2865° / 49°0.11
65 °
Mammoth, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.11 in
Chance of precipitation33%
Record high84° (2024)
Record low35° (2017)
Thu, 2965° / 49°0.15
65 °
Mammoth, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.15 in
Chance of precipitation32%
Record high82° (2024)
Record low32° (2017)
Fri, 3066° / 49°0.15
66 °
Mammoth, Friday, 30 October
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.15 in
Chance of precipitation30%
Record high82° (2016)
Record low31° (1993)
Sat, 3165° / 50°0.19
65 °
Mammoth, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high65°
Average low50°
Average precipitation0.19 in
Chance of precipitation38%
Record high82° (2016)
Record low28° (1993)
Sun, 0164° / 49°0.17
64 °
Mammoth, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high64°
Average low49°
Average precipitation0.17 in
Chance of precipitation33%
Record high81° (2016)
Record low27° (2019)
Mon, 0263° / 47°0.08
63 °
Mammoth, Monday, 2 November
Climate normal for this date — 60-year average.
Average high63°
Average low47°
Average precipitation0.08 in
Chance of precipitation23%
Record high81° (2016)
Record low28° (1991)
Tue, 0362° / 47°0.08
62 °
Mammoth, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high62°
Average low47°
Average precipitation0.08 in
Chance of precipitation23%
Record high79° (2016)
Record low23° (1991)
Wed, 0462° / 47°0.13
62 °
Mammoth, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high62°
Average low47°
Average precipitation0.13 in
Chance of precipitation25%
Record high79° (1978)
Record low24° (1991)
Thu, 0561° / 46°0.18
61 °
Mammoth, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high61°
Average low46°
Average precipitation0.18 in
Chance of precipitation32%
Record high81° (2017)
Record low29° (1991)
Fri, 0661° / 45°0.13
61 °
Mammoth, Friday, 6 November
Climate normal for this date — 60-year average.
Average high61°
Average low45°
Average precipitation0.13 in
Chance of precipitation27%
Record high78° (2023)
Record low30° (1967)
Sat, 0762° / 46°0.12
62 °
Mammoth, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high62°
Average low46°
Average precipitation0.12 in
Chance of precipitation17%
Record high80° (2023)
Record low28° (1993)
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 Mammoth, MO 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 Mammoth, MO 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.