Monthly outlook for Big Spring, MD: average high 83.7°, average low 63.3°. That is 0.2° above the climate normal for August. Precipitation is expected on 6 days (about 1.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (96.8°), the coolest 15 August (54°).
83.7°/63.3°
Average high / low
+0.2°
Above normal
6 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
86.1°
84.1°
+1.1°
18 August – 27 August
79.9°
82.5°
-1.5°
28 August – 6 September
at normal
81.7°
—
August records over 66 years
99.7°12 August 2021All-time high
48.9°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — Hagerstown (12 mi).
Sun, 0987° / 70°0
87 °
Big Spring, Sunday, 9 August
Partly cloudy. High 87°, low 70°.
Pressure30.03 inHg
Wind9 mph NW
Humidity41%
Visibility6.2 mi
Dew point62°
Mon, 1097° / 68°0.13
97 °
Big Spring, Monday, 10 August
Rain. High 97°, low 68°.
Pressure30.06 inHg
Wind10.6 mph NW
Humidity50%
Visibility6.2 mi
Dew point65°
Tue, 1190° / 67°0.03
90 °
Big Spring, Tuesday, 11 August
Light rain. High 90°, low 67°.
Pressure29.94 inHg
Wind9.6 mph W
Humidity48%
Visibility6.2 mi
Dew point63°
Wed, 1283° / 66°0.44
83 °
Big Spring, Wednesday, 12 August
Rain. High 83°, low 66°.
Pressure29.80 inHg
Wind7.2 mph NW
Humidity62%
Visibility6.2 mi
Dew point68°
Thu, 1388° / 68°0.04
88 °
Big Spring, Thursday, 13 August
Light rain. High 88°, low 68°.
Pressure29.80 inHg
Wind12.4 mph NW
Humidity40%
Visibility—
Dew point58°
Fri, 1481° / 60°0.15
81 °
Big Spring, Friday, 14 August
Light rain. High 81°, low 60°.
Pressure29.97 inHg
Wind12.1 mph N
Humidity36%
Visibility—
Dew point49°
Sat, 1579° / 54°0
79 °
Big Spring, Saturday, 15 August
Clear. High 79°, low 54°.
Pressure30.21 inHg
Wind10.4 mph NW
Humidity33%
Visibility—
Dew point44°
Sun, 1682° / 55°0
82 °
Big Spring, Sunday, 16 August
Clear. High 82°, low 55°.
Pressure30.27 inHg
Wind5 mph N
Humidity27%
Visibility—
Dew point42°
Mon, 1789° / 59°0
89 °
Big Spring, Monday, 17 August
Partly cloudy. High 89°, low 59°.
Pressure30.09 inHg
Wind6.5 mph S
Humidity41%
Visibility—
Dew point56°
Tue, 1878° / 66°0.22
78 °
Big Spring, Tuesday, 18 August
Rain. High 78°, low 66°.
Pressure29.94 inHg
Wind5.3 mph SW
Humidity74%
Visibility—
Dew point67°
Wed, 1986° / 65°0
86 °
Big Spring, Wednesday, 19 August
Partly cloudy. High 86°, low 65°.
Pressure29.88 inHg
Wind11.4 mph NW
Humidity37%
Visibility—
Dew point54°
Thu, 2083° / 60°0.01
83 °
Big Spring, Thursday, 20 August
Light rain. High 83°, low 60°.
Pressure29.97 inHg
Wind5.2 mph NE
Humidity45%
Visibility—
Dew point53°
Fri, 2168° / 62°0.14
68 °
Big Spring, Friday, 21 August
Light rain. High 68°, low 62°.
Pressure29.85 inHg
Wind5 mph NE
Humidity97%
Visibility—
Dew point65°
Sat, 2286° / 65°0
86 °
Big Spring, Saturday, 22 August
Clear. High 86°, low 65°.
Pressure29.80 inHg
Wind12.4 mph NW
Humidity36%
Visibility—
Dew point54°
Sun, 2377° / 58°0
77 °
Big Spring, Sunday, 23 August
Clear. High 77°, low 58°.
Pressure30.06 inHg
Wind14.1 mph NW
Humidity24%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 64°0.06
82 °
Big Spring, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.06 in
Chance of precipitation22%
Record high95° (1968)
Record low54° (1971)
Tue, 2583° / 65°0.05
83 °
Big Spring, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.05 in
Chance of precipitation15%
Record high95° (2007)
Record low54° (1971)
Wed, 2684° / 65°0.05
84 °
Big Spring, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high84°
Average low65°
Average precipitation0.05 in
Chance of precipitation20%
Record high94° (1975)
Record low55° (1963)
Thu, 2783° / 66°0.13
83 °
Big Spring, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high94° (2020)
Record low53° (2025)
Fri, 2884° / 66°0.14
84 °
Big Spring, Friday, 28 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.14 in
Chance of precipitation33%
Record high97° (2024)
Record low52° (2025)
Sat, 2983° / 66°0.06
83 °
Big Spring, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1973)
Record low49° (1982)
Sun, 3083° / 65°0.04
83 °
Big Spring, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.04 in
Chance of precipitation25%
Record high93° (1973)
Record low49° (1986)
Mon, 3182° / 65°0.08
82 °
Big Spring, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation27%
Record high95° (2012)
Record low52° (1976)
Tue, 0181° / 64°0.11
81 °
Big Spring, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation32%
Record high95° (2010)
Record low51° (1967)
Wed, 0281° / 63°0.08
81 °
Big Spring, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.08 in
Chance of precipitation25%
Record high96° (2010)
Record low53° (1967)
Thu, 0382° / 64°0.05
82 °
Big Spring, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.05 in
Chance of precipitation23%
Record high94° (2010)
Record low49° (1967)
Fri, 0481° / 64°0.1
81 °
Big Spring, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation27%
Record high94° (2023)
Record low50° (2024)
Sat, 0581° / 63°0.07
81 °
Big Spring, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2023)
Record low51° (1997)
Sun, 0680° / 63°0.21
80 °
Big Spring, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.21 in
Chance of precipitation32%
Record high94° (2023)
Record low50° (2000)
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 Big Spring, MD 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 Big Spring, MD 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.