Monthly outlook for St. James, MD: average high 84.1°, average low 63.3°. That is 0.4° above the climate normal for August. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (97.1°), the coolest 15 August (53.8°).
84.1°/63.3°
Average high / low
+0.4°
Above normal
5 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
86.4°
84.1°
+1.3°
18 August – 27 August
80.1°
82.5°
-1.3°
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 (5 mi).
Sun, 0987° / 70°0
87 °
St. James, Sunday, 9 August
Partly cloudy. High 87°, low 70°.
Pressure30.03 inHg
Wind10.8 mph NW
Humidity41%
Visibility6.2 mi
Dew point62°
Mon, 1097° / 68°0.3
97 °
St. James, Monday, 10 August
Heavy rain. High 97°, low 68°.
Pressure30.06 inHg
Wind12 mph NW
Humidity46%
Visibility6.2 mi
Dew point65°
Tue, 1191° / 67°0.03
91 °
St. James, Tuesday, 11 August
Light rain. High 91°, low 67°.
Pressure29.94 inHg
Wind11 mph W
Humidity48%
Visibility6.2 mi
Dew point63°
Wed, 1283° / 67°0.35
83 °
St. James, Wednesday, 12 August
Light rain. High 83°, low 67°.
Pressure29.83 inHg
Wind8.1 mph W
Humidity64%
Visibility6.2 mi
Dew point68°
Thu, 1388° / 68°0.02
88 °
St. James, Thursday, 13 August
Light rain. High 88°, low 68°.
Pressure29.80 inHg
Wind14 mph NW
Humidity39%
Visibility—
Dew point58°
Fri, 1481° / 60°0.17
81 °
St. James, Friday, 14 August
Light rain. High 81°, low 60°.
Pressure29.97 inHg
Wind14.5 mph N
Humidity39%
Visibility—
Dew point50°
Sat, 1579° / 54°0
79 °
St. James, Saturday, 15 August
Clear. High 79°, low 54°.
Pressure30.21 inHg
Wind11.6 mph NW
Humidity33%
Visibility—
Dew point44°
Sun, 1681° / 54°0
81 °
St. James, Sunday, 16 August
Clear. High 81°, low 54°.
Pressure30.27 inHg
Wind6.7 mph SE
Humidity27%
Visibility—
Dew point41°
Mon, 1788° / 59°0
88 °
St. James, Monday, 17 August
Mostly clear. High 88°, low 59°.
Pressure30.12 inHg
Wind8.1 mph SW
Humidity43%
Visibility—
Dew point57°
Tue, 1878° / 65°0.2
78 °
St. James, Tuesday, 18 August
Rain. High 78°, low 65°.
Pressure29.94 inHg
Wind8.3 mph S
Humidity72%
Visibility—
Dew point67°
Wed, 1987° / 66°0
87 °
St. James, Wednesday, 19 August
Overcast. High 87°, low 66°.
Pressure29.88 inHg
Wind12.5 mph NW
Humidity36%
Visibility—
Dew point54°
Thu, 2084° / 60°0
84 °
St. James, Thursday, 20 August
Overcast. High 84°, low 60°.
Pressure29.97 inHg
Wind7.2 mph SE
Humidity43%
Visibility—
Dew point53°
Fri, 2168° / 62°0.23
68 °
St. James, Friday, 21 August
Light rain. High 68°, low 62°.
Pressure29.85 inHg
Wind6 mph E
Humidity98%
Visibility—
Dew point67°
Sat, 2287° / 65°0
87 °
St. James, Saturday, 22 August
Clear. High 87°, low 65°.
Pressure29.80 inHg
Wind13.8 mph NW
Humidity36%
Visibility—
Dew point54°
Sun, 2377° / 58°0
77 °
St. James, Sunday, 23 August
Clear. High 77°, low 58°.
Pressure30.06 inHg
Wind16.2 mph N
Humidity24%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 64°0.06
82 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 °
St. James, 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 St. James, 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 St. James, 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.