Monthly outlook for Santa Rosa Tres, PR: average high 90.3°, average low 76.1°. That is 1.1° above the climate normal for August. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 9 days and 1.7 inches. The warmest day looks like 19 August (92.9°), the coolest 23 August (74.4°).
90.3°/76.1°
Average high / low
+1.1°
Above normal
4 / 9
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
90.7°
88.3°
+1.3°
19 August – 28 August
89.6°
88.3°
+0.7°
29 August – 7 September
at normal
88.3°
—
August records over 66 years
95.2°26 August 2019All-time high
71.4°22 August 2022All-time low
Climate normals and records are computed from the nearest reference point — Guaynabo (2 mi).
Mon, 1091° / 78°0
91 °
Santa Rosa Tres, Monday, 10 August
Overcast. High 91°, low 78°.
Pressure30.06 inHg
Wind14.9 mph E
Humidity48%
Visibility6.2 mi
Dew point68°
Tue, 1190° / 76°0
90 °
Santa Rosa Tres, Tuesday, 11 August
Overcast. High 90°, low 76°.
Pressure30.03 inHg
Wind13.2 mph E
Humidity54%
Visibility6.2 mi
Dew point69°
Wed, 1293° / 76°0.01
93 °
Santa Rosa Tres, Wednesday, 12 August
Light rain. High 93°, low 76°.
Pressure30.03 inHg
Wind14.2 mph E
Humidity50%
Visibility6.2 mi
Dew point69°
Thu, 1390° / 76°0.01
90 °
Santa Rosa Tres, Thursday, 13 August
Light rain. High 90°, low 76°.
Pressure30.06 inHg
Wind16.8 mph E
Humidity53%
Visibility—
Dew point68°
Fri, 1491° / 76°0.04
91 °
Santa Rosa Tres, Friday, 14 August
Light rain. High 91°, low 76°.
Pressure30.12 inHg
Wind19.5 mph E
Humidity53%
Visibility—
Dew point68°
Sat, 1590° / 76°0.06
90 °
Santa Rosa Tres, Saturday, 15 August
Light rain. High 90°, low 76°.
Pressure30.09 inHg
Wind18.9 mph E
Humidity64%
Visibility—
Dew point71°
Sun, 1692° / 76°0.01
92 °
Santa Rosa Tres, Sunday, 16 August
Light rain. High 92°, low 76°.
Pressure30.03 inHg
Wind15.1 mph E
Humidity49%
Visibility—
Dew point67°
Mon, 1791° / 75°0.03
91 °
Santa Rosa Tres, Monday, 17 August
Light rain. High 91°, low 75°.
Pressure30.00 inHg
Wind13.9 mph NE
Humidity45%
Visibility—
Dew point64°
Tue, 1890° / 77°0.28
90 °
Santa Rosa Tres, Tuesday, 18 August
Rain. High 90°, low 77°.
Pressure30.00 inHg
Wind9.8 mph NE
Humidity59%
Visibility—
Dew point72°
Wed, 1993° / 77°0.3
93 °
Santa Rosa Tres, Wednesday, 19 August
Rain. High 93°, low 77°.
Pressure30.03 inHg
Wind10.8 mph SE
Humidity50%
Visibility—
Dew point69°
Thu, 2086° / 76°0.32
86 °
Santa Rosa Tres, Thursday, 20 August
Rain. High 86°, low 76°.
Pressure30.00 inHg
Wind10.5 mph E
Humidity67%
Visibility—
Dew point73°
Fri, 2189° / 75°0.02
89 °
Santa Rosa Tres, Friday, 21 August
Light rain. High 89°, low 75°.
Pressure30.00 inHg
Wind13.9 mph E
Humidity54%
Visibility—
Dew point69°
Sat, 2289° / 75°0
89 °
Santa Rosa Tres, Saturday, 22 August
Mostly clear. High 89°, low 75°.
Pressure30.00 inHg
Wind14.7 mph E
Humidity47%
Visibility—
Dew point65°
Sun, 2389° / 74°0.02
89 °
Santa Rosa Tres, Sunday, 23 August
Light rain. High 89°, low 74°.
Pressure30.03 inHg
Wind14.2 mph E
Humidity58%
Visibility—
Dew point69°
Mon, 2491° / 76°0
91 °
Santa Rosa Tres, Monday, 24 August
Overcast. High 91°, low 76°.
Pressure30.06 inHg
Wind15 mph E
Humidity49%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2589° / 76°0.09
89 °
Santa Rosa Tres, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.09 in
Chance of precipitation57%
Record high94° (2019)
Record low73° (2020)
Wed, 2688° / 75°0.1
88 °
Santa Rosa Tres, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.1 in
Chance of precipitation58%
Record high95° (2019)
Record low73° (1972)
Thu, 2789° / 75°0.09
89 °
Santa Rosa Tres, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high89°
Average low75°
Average precipitation0.09 in
Chance of precipitation63%
Record high93° (2023)
Record low73° (1971)
Fri, 2888° / 75°0.13
88 °
Santa Rosa Tres, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.13 in
Chance of precipitation73%
Record high94° (2023)
Record low73° (1971)
Sat, 2989° / 76°0.09
89 °
Santa Rosa Tres, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.09 in
Chance of precipitation50%
Record high94° (2022)
Record low73° (1961)
Sun, 3088° / 76°0.19
88 °
Santa Rosa Tres, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.19 in
Chance of precipitation63%
Record high94° (2023)
Record low74° (1964)
Mon, 3188° / 75°0.12
88 °
Santa Rosa Tres, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.12 in
Chance of precipitation58%
Record high93° (2025)
Record low72° (2021)
Tue, 0189° / 75°0.13
89 °
Santa Rosa Tres, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high89°
Average low75°
Average precipitation0.13 in
Chance of precipitation70%
Record high93° (2025)
Record low73° (1974)
Wed, 0288° / 75°0.11
88 °
Santa Rosa Tres, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.11 in
Chance of precipitation72%
Record high93° (2023)
Record low72° (1986)
Thu, 0389° / 75°0.1
89 °
Santa Rosa Tres, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low75°
Average precipitation0.1 in
Chance of precipitation60%
Record high93° (1967)
Record low73° (1971)
Fri, 0489° / 75°0.1
89 °
Santa Rosa Tres, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low75°
Average precipitation0.1 in
Chance of precipitation57%
Record high95° (2021)
Record low73° (1982)
Sat, 0588° / 75°0.2
88 °
Santa Rosa Tres, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.2 in
Chance of precipitation68%
Record high95° (2023)
Record low72° (1961)
Sun, 0688° / 75°0.19
88 °
Santa Rosa Tres, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.19 in
Chance of precipitation65%
Record high93° (2012)
Record low73° (2018)
Mon, 0788° / 75°0.12
88 °
Santa Rosa Tres, Monday, 7 September
Climate normal for this date — 60-year average.
Average high88°
Average low75°
Average precipitation0.12 in
Chance of precipitation65%
Record high93° (2023)
Record low72° (2022)
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 Santa Rosa Tres, 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 Santa Rosa Tres, 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.