Monthly outlook for Fuerte San Gerónimo, PR: average high 88.8°, average low 78.7°. That is 0.1° above the climate normal for August. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 10 days and 1.7 inches. The warmest day looks like 18 August (92.3°), the coolest 22 August (76.2°).
88.8°/78.7°
Average high / low
+0.1°
Above normal
3 / 10
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
88.8°
88.6°
+0.1°
19 August – 28 August
88.9°
88.5°
+0.2°
29 August – 7 September
at normal
88.6°
—
August records over 66 years
94.6°14 August 1995All-time high
73.2°19 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Caño Martin Peña (3 mi).
Mon, 1089° / 79°0
89 °
Fuerte San Gerónimo, Monday, 10 August
Overcast. High 89°, low 79°.
Pressure30.06 inHg
Wind16.4 mph E
Humidity56%
Visibility6.2 mi
Dew point71°
Tue, 1189° / 78°0
89 °
Fuerte San Gerónimo, Tuesday, 11 August
Overcast. High 89°, low 78°.
Pressure30.03 inHg
Wind16.2 mph E
Humidity60%
Visibility6.2 mi
Dew point72°
Wed, 1290° / 78°0.02
90 °
Fuerte San Gerónimo, Wednesday, 12 August
Light rain. High 90°, low 78°.
Pressure30.00 inHg
Wind14.7 mph E
Humidity60%
Visibility6.2 mi
Dew point72°
Thu, 1389° / 79°0.01
89 °
Fuerte San Gerónimo, Thursday, 13 August
Light rain. High 89°, low 79°.
Pressure30.03 inHg
Wind18.8 mph E
Humidity56%
Visibility6.2 mi
Dew point70°
Fri, 1488° / 80°0.02
88 °
Fuerte San Gerónimo, Friday, 14 August
Light rain. High 88°, low 80°.
Pressure30.12 inHg
Wind20.4 mph E
Humidity60%
Visibility—
Dew point71°
Sat, 1588° / 80°0.02
88 °
Fuerte San Gerónimo, Saturday, 15 August
Light rain. High 88°, low 80°.
Pressure30.09 inHg
Wind21 mph E
Humidity58%
Visibility—
Dew point70°
Sun, 1688° / 80°0.02
88 °
Fuerte San Gerónimo, Sunday, 16 August
Light rain. High 88°, low 80°.
Pressure30.03 inHg
Wind16.1 mph NE
Humidity63%
Visibility—
Dew point72°
Mon, 1787° / 79°0.06
87 °
Fuerte San Gerónimo, Monday, 17 August
Light rain. High 87°, low 79°.
Pressure29.97 inHg
Wind14.6 mph NE
Humidity62%
Visibility—
Dew point71°
Tue, 1892° / 77°0.04
92 °
Fuerte San Gerónimo, Tuesday, 18 August
Light rain. High 92°, low 77°.
Pressure30.00 inHg
Wind8.5 mph SE
Humidity55%
Visibility—
Dew point69°
Wed, 1991° / 78°0.01
91 °
Fuerte San Gerónimo, Wednesday, 19 August
Light rain. High 91°, low 78°.
Pressure30.06 inHg
Wind18.1 mph E
Humidity56%
Visibility—
Dew point71°
Thu, 2088° / 78°0.02
88 °
Fuerte San Gerónimo, Thursday, 20 August
Light rain. High 88°, low 78°.
Pressure30.03 inHg
Wind16.2 mph NE
Humidity64%
Visibility—
Dew point72°
Fri, 2188° / 77°0.02
88 °
Fuerte San Gerónimo, Friday, 21 August
Light rain. High 88°, low 77°.
Pressure30.03 inHg
Wind17.3 mph E
Humidity61%
Visibility—
Dew point71°
Sat, 2290° / 76°0.01
90 °
Fuerte San Gerónimo, Saturday, 22 August
Light rain. High 90°, low 76°.
Pressure30.06 inHg
Wind16.7 mph E
Humidity63%
Visibility—
Dew point71°
Sun, 2389° / 79°0.04
89 °
Fuerte San Gerónimo, Sunday, 23 August
Light rain. High 89°, low 79°.
Pressure30.12 inHg
Wind18.3 mph E
Humidity59%
Visibility—
Dew point72°
Mon, 2487° / 80°0.17
87 °
Fuerte San Gerónimo, Monday, 24 August
Light rain. High 87°, low 80°.
Pressure30.09 inHg
Wind16.9 mph E
Humidity67%
Visibility—
Dew point73°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2589° / 76°0.1
89 °
Fuerte San Gerónimo, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.1 in
Chance of precipitation53%
Record high93° (1967)
Record low73° (1972)
Wed, 2689° / 76°0.09
89 °
Fuerte San Gerónimo, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.09 in
Chance of precipitation57%
Record high94° (2019)
Record low74° (1972)
Thu, 2789° / 76°0.09
89 °
Fuerte San Gerónimo, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.09 in
Chance of precipitation65%
Record high93° (2002)
Record low74° (1971)
Fri, 2888° / 76°0.14
88 °
Fuerte San Gerónimo, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.14 in
Chance of precipitation73%
Record high93° (1966)
Record low73° (1971)
Sat, 2989° / 76°0.09
89 °
Fuerte San Gerónimo, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.09 in
Chance of precipitation50%
Record high92° (1967)
Record low73° (1961)
Sun, 3089° / 76°0.19
89 °
Fuerte San Gerónimo, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.19 in
Chance of precipitation65%
Record high94° (1967)
Record low74° (1964)
Mon, 3189° / 76°0.12
89 °
Fuerte San Gerónimo, Monday, 31 August
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.12 in
Chance of precipitation57%
Record high93° (1967)
Record low74° (2021)
Tue, 0189° / 76°0.13
89 °
Fuerte San Gerónimo, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.13 in
Chance of precipitation68%
Record high93° (1967)
Record low73° (1974)
Wed, 0288° / 76°0.11
88 °
Fuerte San Gerónimo, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation72%
Record high93° (1967)
Record low73° (1986)
Thu, 0389° / 76°0.1
89 °
Fuerte San Gerónimo, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.1 in
Chance of precipitation62%
Record high93° (1967)
Record low74° (1971)
Fri, 0489° / 76°0.1
89 °
Fuerte San Gerónimo, Friday, 4 September
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.1 in
Chance of precipitation60%
Record high92° (2003)
Record low74° (1982)
Sat, 0588° / 76°0.2
88 °
Fuerte San Gerónimo, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.2 in
Chance of precipitation67%
Record high93° (1978)
Record low72° (1961)
Sun, 0688° / 76°0.19
88 °
Fuerte San Gerónimo, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.19 in
Chance of precipitation67%
Record high94° (2012)
Record low74° (1961)
Mon, 0789° / 76°0.11
89 °
Fuerte San Gerónimo, Monday, 7 September
Climate normal for this date — 60-year average.
Average high89°
Average low76°
Average precipitation0.11 in
Chance of precipitation67%
Record high93° (2012)
Record low74° (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 Fuerte San Gerónimo, 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 Fuerte San Gerónimo, 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.