Monthly outlook for Stella, PR: average high 86.2°, average low 79.5°. That is 0.4° below the climate normal for August. Precipitation is expected on 10 days (about 1.5 inches), against a normal of 9 days and 1.5 inches. The warmest day looks like 9 August (89.9°), the coolest 9 August (76.2°).
86.2°/79.5°
Average high / low
−0.4°
Below normal
10 / 9
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
87°
87°
+0.1°
18 August – 27 August
84.8°
86.7°
-1°
28 August – 6 September
at normal
86.5°
—
August records over 66 years
94.5°28 August 2023All-time high
73.6°5 August 2018All-time low
Sun, 0990° / 76°0.13
90 °
Stella, Sunday, 9 August
Rain. High 90°, low 76°.
Pressure30.00 inHg
Wind17.3 mph NE
Humidity71%
Visibility6.2 mi
Dew point76°
Mon, 1086° / 77°0.02
86 °
Stella, Monday, 10 August
Light rain. High 86°, low 77°.
Pressure30.03 inHg
Wind7.4 mph W
Humidity70%
Visibility6.2 mi
Dew point74°
Tue, 1185° / 80°0.32
85 °
Stella, Tuesday, 11 August
Rain. High 85°, low 80°.
Pressure30.03 inHg
Wind3.4 mph SW
Humidity72%
Visibility6.2 mi
Dew point74°
Wed, 1285° / 80°0.08
85 °
Stella, Wednesday, 12 August
Light rain. High 85°, low 80°.
Pressure30.00 inHg
Wind8.5 mph W
Humidity69%
Visibility6.2 mi
Dew point73°
Thu, 1387° / 80°0
87 °
Stella, Thursday, 13 August
Overcast. High 87°, low 80°.
Pressure30.03 inHg
Wind13.2 mph E
Humidity66%
Visibility—
Dew point72°
Fri, 1488° / 79°0
88 °
Stella, Friday, 14 August
Light rain. High 88°, low 79°.
Pressure30.09 inHg
Wind24.3 mph NE
Humidity64%
Visibility—
Dew point71°
Sat, 1587° / 80°0
87 °
Stella, Saturday, 15 August
Clear. High 87°, low 80°.
Pressure30.06 inHg
Wind23.5 mph NE
Humidity56%
Visibility—
Dew point68°
Sun, 1687° / 81°0.02
87 °
Stella, Sunday, 16 August
Light rain. High 87°, low 81°.
Pressure30.03 inHg
Wind23.8 mph NE
Humidity66%
Visibility—
Dew point73°
Mon, 1788° / 81°0.44
88 °
Stella, Monday, 17 August
Rain. High 88°, low 81°.
Pressure30.00 inHg
Wind21.1 mph NE
Humidity63%
Visibility—
Dew point73°
Tue, 1885° / 81°0.11
85 °
Stella, Tuesday, 18 August
Light rain. High 85°, low 81°.
Pressure29.97 inHg
Wind18.6 mph NE
Humidity72%
Visibility—
Dew point75°
Wed, 1986° / 80°0.11
86 °
Stella, Wednesday, 19 August
Light rain. High 86°, low 80°.
Pressure29.97 inHg
Wind19.2 mph S
Humidity70%
Visibility—
Dew point74°
Thu, 2085° / 81°0.04
85 °
Stella, Thursday, 20 August
Light rain. High 85°, low 81°.
Pressure30.03 inHg
Wind8.5 mph E
Humidity73%
Visibility—
Dew point75°
Fri, 2186° / 80°0.01
86 °
Stella, Friday, 21 August
Light rain. High 86°, low 80°.
Pressure30.03 inHg
Wind15.6 mph N
Humidity65%
Visibility—
Dew point71°
Sat, 2283° / 79°0.04
83 °
Stella, Saturday, 22 August
Light rain. High 83°, low 79°.
Pressure30.00 inHg
Wind15.8 mph NW
Humidity69%
Visibility—
Dew point72°
Sun, 2383° / 79°0.12
83 °
Stella, Sunday, 23 August
Light rain. High 83°, low 79°.
Pressure30.00 inHg
Wind8.9 mph NW
Humidity67%
Visibility—
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 78°0.12
87 °
Stella, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.12 in
Chance of precipitation68%
Record high92° (2023)
Record low75° (2018)
Tue, 2587° / 78°0.11
87 °
Stella, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.11 in
Chance of precipitation55%
Record high90° (1971)
Record low74° (2018)
Wed, 2687° / 78°0.1
87 °
Stella, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.1 in
Chance of precipitation57%
Record high92° (2024)
Record low76° (2018)
Thu, 2787° / 78°0.08
87 °
Stella, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.08 in
Chance of precipitation58%
Record high92° (2024)
Record low76° (2022)
Fri, 2887° / 78°0.09
87 °
Stella, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.09 in
Chance of precipitation65%
Record high94° (2023)
Record low76° (2018)
Sat, 2986° / 79°0.09
86 °
Stella, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low79°
Average precipitation0.09 in
Chance of precipitation62%
Record high93° (2024)
Record low76° (2022)
Sun, 3087° / 78°0.12
87 °
Stella, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.12 in
Chance of precipitation53%
Record high92° (2023)
Record low76° (1985)
Mon, 3187° / 78°0.13
87 °
Stella, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.13 in
Chance of precipitation47%
Record high92° (2023)
Record low75° (2021)
Tue, 0187° / 78°0.08
87 °
Stella, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.08 in
Chance of precipitation52%
Record high92° (2024)
Record low76° (2022)
Wed, 0286° / 78°0.07
86 °
Stella, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low78°
Average precipitation0.07 in
Chance of precipitation52%
Record high91° (2023)
Record low76° (2021)
Thu, 0387° / 78°0.06
87 °
Stella, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.06 in
Chance of precipitation38%
Record high94° (2024)
Record low76° (1965)
Fri, 0487° / 78°0.06
87 °
Stella, Friday, 4 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.06 in
Chance of precipitation48%
Record high93° (2021)
Record low75° (2018)
Sat, 0586° / 78°0.18
86 °
Stella, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high86°
Average low78°
Average precipitation0.18 in
Chance of precipitation53%
Record high93° (2021)
Record low74° (2018)
Sun, 0686° / 78°0.13
86 °
Stella, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high86°
Average low78°
Average precipitation0.13 in
Chance of precipitation58%
Record high91° (2021)
Record low74° (2023)
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 Stella, PR 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 Stella, PR 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.