As of 01:58 CDT

Weather in Sinai, SD

39°Current weather

Sinai, Monday, 26 October, 01:58

Fog. Feels like 33°. High 41°, low 37°.

Pressure30.47 inHg
Wind10.4 mph NE
Humidity99%
Visibility6.0 mi
Dew point39°

Monthly outlook for Sinai, SD: average high 54.8°, average low 42.7°. That is 3.7° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 30 October (63.4°), the coolest 8 November (30.7°).

54.8°/42.7°
Average high / low
+3.7°
Above normal
5 / 3
Wet days / normal
1.6 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
26 October – 4 November55.8°49.8°+3.3°
5 November – 14 November53.1°43.7°+5.2°
15 November – 24 Novemberat normal39.2°—

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).

Tue, 2753° / 39°0.1Rain
53 °Rain

Sinai, Tuesday, 27 October

Rain. High 53°, low 39°.

Pressure30.09 inHg
Wind7.4 mph SW
Humidity82%
Visibility6.2 mi
Dew point42°
Wed, 2860° / 48°0.1Light rain
60 °Light rain

Sinai, Wednesday, 28 October

Light rain. High 60°, low 48°.

Pressure29.94 inHg
Wind9.2 mph S
Humidity98%
Visibility6.2 mi
Dew point56°
Thu, 2961° / 43°0Clear
61 °Clear

Sinai, Thursday, 29 October

Clear. High 61°, low 43°.

Pressure30.15 inHg
Wind5 mph E
Humidity63%
Visibility6.2 mi
Dew point41°
Fri, 3063° / 48°0Overcast
63 °Overcast

Sinai, Friday, 30 October

Overcast. High 63°, low 48°.

Pressure30.03 inHg
Wind10.4 mph E
Humidity77%
Visibility—
Dew point53°
Sat, 3158° / 48°0.36Light rain
58 °Light rain

Sinai, Saturday, 31 October

Light rain. High 58°, low 48°.

Pressure30.03 inHg
Wind9.6 mph S
Humidity82%
Visibility—
Dew point52°
Sun, 0159° / 49°0Overcast
59 °Overcast

Sinai, Sunday, 1 November

Overcast. High 59°, low 49°.

Pressure30.00 inHg
Wind10.7 mph S
Humidity85%
Visibility—
Dew point51°
Mon, 0259° / 46°0.08Light rain
59 °Light rain

Sinai, Monday, 2 November

Light rain. High 59°, low 46°.

Pressure29.91 inHg
Wind12.7 mph S
Humidity74%
Visibility—
Dew point47°
Tue, 0356° / 40°0Partly cloudy
56 °Partly cloudy

Sinai, Tuesday, 3 November

Partly cloudy. High 56°, low 40°.

Pressure30.15 inHg
Wind8 mph NW
Humidity42%
Visibility—
Dew point29°
Wed, 0449° / 42°0Overcast
49 °Overcast

Sinai, Wednesday, 4 November

Overcast. High 49°, low 42°.

Pressure30.36 inHg
Wind11.8 mph SE
Humidity56%
Visibility—
Dew point33°
Thu, 0547° / 43°0.01Light rain
47 °Light rain

Sinai, Thursday, 5 November

Light rain. High 47°, low 43°.

Pressure30.24 inHg
Wind16.8 mph S
Humidity91%
Visibility—
Dew point41°
Fri, 0659° / 45°0Overcast
59 °Overcast

Sinai, Friday, 6 November

Overcast. High 59°, low 45°.

Pressure29.68 inHg
Wind18.3 mph S
Humidity86%
Visibility—
Dew point50°
Sat, 0757° / 42°0.01Light rain
57 °Light rain

Sinai, Saturday, 7 November

Light rain. High 57°, low 42°.

Pressure29.74 inHg
Wind16.1 mph NW
Humidity72%
Visibility—
Dew point45°
Sun, 0844° / 31°0Clear
44 °Clear

Sinai, Sunday, 8 November

Clear. High 44°, low 31°.

Pressure30.39 inHg
Wind14.2 mph NW
Humidity52%
Visibility—
Dew point23°
Mon, 0959° / 37°0Overcast
59 °Overcast

Sinai, Monday, 9 November

Overcast. High 59°, low 37°.

Pressure29.97 inHg
Wind16.9 mph S
Humidity64%
Visibility—
Dew point38°
Tue, 1052° / 44°0Overcast
52 °Overcast

Sinai, Tuesday, 10 November

Overcast. High 52°, low 44°.

Pressure29.91 inHg
Wind11.1 mph NE
Humidity68%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 1140° / 26°0.03Climate normal
40 °Climate normal

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°0.06Climate normal
40 °Climate normal

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°0.03Climate normal
42 °Climate normal

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°0.03Climate normal
42 °Climate normal

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°0.04Climate normal
42 °Climate normal

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°0.06Climate normal
42 °Climate normal

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°0.05Climate normal
41 °Climate normal

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°0.07Climate normal
40 °Climate normal

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°0.09Climate normal
40 °Climate normal

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°0.05Climate normal
38 °Climate normal

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°0.02Climate normal
38 °Climate normal

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°0.02Climate normal
38 °Climate normal

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°0.03Climate normal
37 °Climate normal

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)
Tue, 2437° / 23°0.04Climate normal
37 °Climate normal

Sinai, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high37°
Average low23°
Average precipitation0.04 in
Chance of precipitation8%
Record high59° (1990)
Record low-6° (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.