Monthly outlook for Sinai, SD: average high 54.6°, average low 44.6°. That is 3.2° above the climate normal for October. Precipitation is expected on 7 days (about 2.4 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 2 November (68.5°), the coolest 9 November (37.7°).
54.6°/44.6°
Average high / low
+3.2°
Above normal
7 / 3
Wet days / normal
2.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
57°
50.4°
+3.7°
4 November – 13 November
50.7°
44.2°
+3.6°
14 November – 23 November
at normal
39.7°
—
October records over 66 years
88.5°3 October 2025All-time high
8.2°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Nunda (6 mi).
Mon, 2642° / 40°1.04
42 °
Sinai, Monday, 26 October
Rain. High 42°, low 40°.
Pressure30.42 inHg
Wind12.2 mph E
Humidity94%
Visibility1.5 mi
Dew point40°
Tue, 2754° / 42°0.07
54 °
Sinai, Tuesday, 27 October
Light rain. High 54°, low 42°.
Pressure30.09 inHg
Wind9.4 mph SW
Humidity81%
Visibility6.2 mi
Dew point41°
Wed, 2859° / 47°0.2
59 °
Sinai, Wednesday, 28 October
Light rain. High 59°, low 47°.
Pressure29.97 inHg
Wind5.2 mph S
Humidity89%
Visibility6.2 mi
Dew point55°
Thu, 2961° / 43°0
61 °
Sinai, Thursday, 29 October
Clear. High 61°, low 43°.
Pressure30.18 inHg
Wind7.8 mph SE
Humidity51%
Visibility—
Dew point39°
Fri, 3062° / 46°0
62 °
Sinai, Friday, 30 October
Overcast. High 62°, low 46°.
Pressure30.15 inHg
Wind8.8 mph NE
Humidity70%
Visibility—
Dew point48°
Sat, 3157° / 52°0.23
57 °
Sinai, Saturday, 31 October
Light rain. High 57°, low 52°.
Pressure29.97 inHg
Wind6.7 mph S
Humidity97%
Visibility—
Dew point55°
Sun, 0165° / 50°0
65 °
Sinai, Sunday, 1 November
Partly cloudy. High 65°, low 50°.
Pressure30.03 inHg
Wind10 mph SE
Humidity68%
Visibility—
Dew point51°
Mon, 0269° / 55°0.02
69 °
Sinai, Monday, 2 November
Light rain. High 69°, low 55°.
Pressure29.50 inHg
Wind19.7 mph S
Humidity94%
Visibility—
Dew point57°
Tue, 0355° / 48°0
55 °
Sinai, Tuesday, 3 November
Mostly clear. High 55°, low 48°.
Pressure29.85 inHg
Wind23.2 mph W
Humidity49%
Visibility—
Dew point34°
Wed, 0451° / 43°0
51 °
Sinai, Wednesday, 4 November
Overcast. High 51°, low 43°.
Pressure29.91 inHg
Wind18.9 mph NW
Humidity59%
Visibility—
Dew point35°
Thu, 0553° / 40°0
53 °
Sinai, Thursday, 5 November
Overcast. High 53°, low 40°.
Pressure29.88 inHg
Wind7.8 mph NW
Humidity65%
Visibility—
Dew point37°
Fri, 0654° / 40°0
54 °
Sinai, Friday, 6 November
Overcast. High 54°, low 40°.
Pressure29.77 inHg
Wind12.9 mph SE
Humidity55%
Visibility—
Dew point35°
Sat, 0750° / 46°0.53
50 °
Sinai, Saturday, 7 November
Rain. High 50°, low 46°.
Pressure29.44 inHg
Wind14.6 mph SE
Humidity83%
Visibility—
Dew point44°
Sun, 0846° / 42°0.18
46 °
Sinai, Sunday, 8 November
Light rain. High 46°, low 42°.
Pressure29.77 inHg
Wind14 mph N
Humidity90%
Visibility—
Dew point39°
Mon, 0951° / 38°0
51 °
Sinai, Monday, 9 November
Clear. High 51°, low 38°.
Pressure30.12 inHg
Wind11.2 mph NW
Humidity58%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1041° / 27°0.06
41 °
Sinai, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.06 in
Chance of precipitation20%
Record high63° (2016)
Record low5° (1986)
Wed, 1140° / 26°0.03
40 °
Sinai, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.03 in
Chance of precipitation20%
Record high62° (2005)
Record low0° (1986)
Thu, 1240° / 26°0.06
40 °
Sinai, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.06 in
Chance of precipitation23%
Record high64° (2005)
Record low-2° (1966)
Fri, 1342° / 28°0.03
42 °
Sinai, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.03 in
Chance of precipitation20%
Record high67° (1999)
Record low-5° (1986)
Sat, 1442° / 29°0.03
42 °
Sinai, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high68° (2025)
Record low5° (2014)
Sun, 1542° / 28°0.04
42 °
Sinai, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.04 in
Chance of precipitation17%
Record high63° (2001)
Record low11° (2000)
Mon, 1642° / 28°0.06
42 °
Sinai, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.06 in
Chance of precipitation18%
Record high67° (2001)
Record low0° (2014)
Tue, 1741° / 27°0.05
41 °
Sinai, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.05 in
Chance of precipitation18%
Record high64° (2001)
Record low4° (2014)
Wed, 1840° / 27°0.07
40 °
Sinai, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.07 in
Chance of precipitation25%
Record high65° (1999)
Record low3° (1996)
Thu, 1940° / 26°0.09
40 °
Sinai, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.09 in
Chance of precipitation25%
Record high58° (2003)
Record low7° (1996)
Fri, 2038° / 25°0.05
38 °
Sinai, Friday, 20 November
Climate normal for this date — 60-year average.
Average high38°
Average low25°
Average precipitation0.05 in
Chance of precipitation15%
Record high61° (1962)
Record low2° (1985)
Sat, 2138° / 23°0.02
38 °
Sinai, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high38°
Average low23°
Average precipitation0.02 in
Chance of precipitation15%
Record high62° (2012)
Record low-4° (1985)
Sun, 2238° / 24°0.02
38 °
Sinai, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.02 in
Chance of precipitation18%
Record high58° (1974)
Record low6° (1970)
Mon, 2337° / 24°0.03
37 °
Sinai, Monday, 23 November
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.03 in
Chance of precipitation15%
Record high54° (2006)
Record low-3° (1985)
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 Sinai, SD 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 Sinai, SD 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.