Monthly outlook for Byram, CT: average high 82°, average low 68.7°. That is 0.7° above the climate normal for August. Precipitation is expected on 7 days (about 3.6 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 10 August (91.8°), the coolest 15 August (60.9°).
82°/68.7°
Average high / low
+0.7°
Above normal
7 / 6
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
84.6°
81.6°
+1.7°
18 August – 27 August
77.7°
79.8°
-1.2°
28 August – 6 September
at normal
78.5°
—
August records over 66 years
99.7°9 August 2001All-time high
50.7°29 August 1982All-time low
Sun, 0992° / 74°0
92 °
Byram, Sunday, 9 August
Clear. High 92°, low 74°.
Pressure29.94 inHg
Wind6 mph NW
Humidity45%
Visibility6.2 mi
Dew point65°
Mon, 1092° / 72°0
92 °
Byram, Monday, 10 August
Light rain. High 92°, low 72°.
Pressure29.97 inHg
Wind4.9 mph S
Humidity48%
Visibility6.2 mi
Dew point63°
Tue, 1191° / 75°0.06
91 °
Byram, Tuesday, 11 August
Light rain. High 91°, low 75°.
Pressure29.85 inHg
Wind8.3 mph NW
Humidity39%
Visibility6.2 mi
Dew point58°
Wed, 1280° / 71°0.43
80 °
Byram, Wednesday, 12 August
Rain. High 80°, low 71°.
Pressure29.77 inHg
Wind4.6 mph N
Humidity72%
Visibility6.2 mi
Dew point66°
Thu, 1388° / 68°0.08
88 °
Byram, Thursday, 13 August
Light rain. High 88°, low 68°.
Pressure29.74 inHg
Wind16.2 mph NW
Humidity61%
Visibility—
Dew point66°
Fri, 1478° / 66°0
78 °
Byram, Friday, 14 August
Overcast. High 78°, low 66°.
Pressure29.94 inHg
Wind13.9 mph NW
Humidity39%
Visibility—
Dew point46°
Sat, 1578° / 61°0
78 °
Byram, Saturday, 15 August
Clear. High 78°, low 61°.
Pressure30.15 inHg
Wind11.2 mph N
Humidity38%
Visibility—
Dew point43°
Sun, 1679° / 64°0
79 °
Byram, Sunday, 16 August
Overcast. High 79°, low 64°.
Pressure30.30 inHg
Wind8.9 mph SW
Humidity40%
Visibility—
Dew point46°
Mon, 1781° / 68°0
81 °
Byram, Monday, 17 August
Overcast. High 81°, low 68°.
Pressure30.21 inHg
Wind13.3 mph S
Humidity41%
Visibility—
Dew point51°
Tue, 1880° / 72°0.22
80 °
Byram, Tuesday, 18 August
Light rain. High 80°, low 72°.
Pressure30.00 inHg
Wind11.7 mph S
Humidity79%
Visibility—
Dew point67°
Wed, 1983° / 71°0.06
83 °
Byram, Wednesday, 19 August
Light rain. High 83°, low 71°.
Pressure29.85 inHg
Wind13.7 mph N
Humidity62%
Visibility—
Dew point63°
Thu, 2077° / 67°0
77 °
Byram, Thursday, 20 August
Light rain. High 77°, low 67°.
Pressure29.97 inHg
Wind9.7 mph N
Humidity54%
Visibility—
Dew point56°
Fri, 2176° / 69°1.74
76 °
Byram, Friday, 21 August
Heavy rain. High 76°, low 69°.
Pressure29.97 inHg
Wind13.9 mph S
Humidity72%
Visibility—
Dew point62°
Sat, 2279° / 69°0.94
79 °
Byram, Saturday, 22 August
Heavy rain. High 79°, low 69°.
Pressure29.77 inHg
Wind10.5 mph SW
Humidity95%
Visibility—
Dew point68°
Sun, 2372° / 61°0
72 °
Byram, Sunday, 23 August
Clear. High 72°, low 61°.
Pressure29.94 inHg
Wind18.1 mph NW
Humidity46%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2479° / 65°0.07
79 °
Byram, Monday, 24 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.07 in
Chance of precipitation22%
Record high92° (1998)
Record low54° (1971)
Tue, 2580° / 65°0.08
80 °
Byram, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.08 in
Chance of precipitation23%
Record high93° (1968)
Record low56° (1971)
Wed, 2680° / 66°0.06
80 °
Byram, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.06 in
Chance of precipitation25%
Record high90° (1993)
Record low56° (2019)
Thu, 2781° / 67°0.16
81 °
Byram, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.16 in
Chance of precipitation35%
Record high93° (1980)
Record low56° (1969)
Fri, 2880° / 67°0.21
80 °
Byram, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.21 in
Chance of precipitation38%
Record high93° (2024)
Record low57° (1986)
Sat, 2979° / 66°0.14
79 °
Byram, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low66°
Average precipitation0.14 in
Chance of precipitation30%
Record high92° (2018)
Record low51° (1982)
Sun, 3080° / 66°0.08
80 °
Byram, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.08 in
Chance of precipitation30%
Record high92° (1973)
Record low53° (1965)
Mon, 3179° / 65°0.05
79 °
Byram, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.05 in
Chance of precipitation18%
Record high94° (2010)
Record low54° (1976)
Tue, 0178° / 65°0.09
78 °
Byram, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.09 in
Chance of precipitation27%
Record high94° (2010)
Record low53° (2017)
Wed, 0278° / 64°0.18
78 °
Byram, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.18 in
Chance of precipitation32%
Record high92° (2010)
Record low51° (2017)
Thu, 0378° / 64°0.11
78 °
Byram, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.11 in
Chance of precipitation32%
Record high91° (2015)
Record low53° (1967)
Fri, 0478° / 65°0.12
78 °
Byram, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.12 in
Chance of precipitation27%
Record high90° (2023)
Record low54° (1997)
Sat, 0578° / 64°0.06
78 °
Byram, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.06 in
Chance of precipitation25%
Record high92° (2023)
Record low55° (2000)
Sun, 0677° / 64°0.2
77 °
Byram, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.2 in
Chance of precipitation35%
Record high93° (2023)
Record low53° (1984)
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 Byram, CT 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 Byram, CT 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.