Monthly outlook for Zanja Blanca, PR: average high 87.3°, average low 72.6°. That is 0° below the climate normal for August. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 10 days and 2.2 inches. The warmest day looks like 10 August (89.9°), the coolest 21 August (70.7°).
87.3°/72.6°
Average high / low
−0°
Below normal
2 / 10
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
87.8°
87.5°
+0.2°
19 August – 28 August
86.4°
87.2°
-0.4°
29 August – 7 September
at normal
86.9°
—
August records over 66 years
95.4°9 August 2022All-time high
70°25 August 2024All-time low
Climate normals and records are computed from the nearest reference point — Coamo (3 mi).
Mon, 1090° / 73°0
90 °
Zanja Blanca, Monday, 10 August
Mostly clear. High 90°, low 73°.
Pressure30.06 inHg
Wind15.3 mph SE
Humidity49%
Visibility6.2 mi
Dew point68°
Tue, 1188° / 72°0.02
88 °
Zanja Blanca, Tuesday, 11 August
Light rain. High 88°, low 72°.
Pressure30.03 inHg
Wind15.6 mph SE
Humidity53%
Visibility6.2 mi
Dew point68°
Wed, 1286° / 73°0
86 °
Zanja Blanca, Wednesday, 12 August
Overcast. High 86°, low 73°.
Pressure30.03 inHg
Wind14.7 mph SE
Humidity57%
Visibility6.2 mi
Dew point70°
Thu, 1386° / 73°0
86 °
Zanja Blanca, Thursday, 13 August
Overcast. High 86°, low 73°.
Pressure30.06 inHg
Wind18.6 mph SE
Humidity53%
Visibility—
Dew point65°
Fri, 1488° / 72°0
88 °
Zanja Blanca, Friday, 14 August
Overcast. High 88°, low 72°.
Pressure30.12 inHg
Wind17.1 mph E
Humidity50%
Visibility—
Dew point64°
Sat, 1589° / 72°0
89 °
Zanja Blanca, Saturday, 15 August
Clear. High 89°, low 72°.
Pressure30.03 inHg
Wind17.6 mph E
Humidity42%
Visibility—
Dew point61°
Sun, 1689° / 72°0
89 °
Zanja Blanca, Sunday, 16 August
Partly cloudy. High 89°, low 72°.
Pressure30.03 inHg
Wind15.3 mph SE
Humidity46%
Visibility—
Dew point62°
Mon, 1788° / 72°0.35
88 °
Zanja Blanca, Monday, 17 August
Rain. High 88°, low 72°.
Pressure30.00 inHg
Wind12.2 mph E
Humidity51%
Visibility—
Dew point66°
Tue, 1885° / 73°0.18
85 °
Zanja Blanca, Tuesday, 18 August
Light rain. High 85°, low 73°.
Pressure30.03 inHg
Wind10.2 mph S
Humidity60%
Visibility—
Dew point68°
Wed, 1985° / 74°0
85 °
Zanja Blanca, Wednesday, 19 August
Light rain. High 85°, low 74°.
Pressure30.06 inHg
Wind11.2 mph S
Humidity60%
Visibility—
Dew point68°
Thu, 2087° / 74°0
87 °
Zanja Blanca, Thursday, 20 August
Partly cloudy. High 87°, low 74°.
Pressure30.06 inHg
Wind11 mph SE
Humidity53%
Visibility—
Dew point65°
Fri, 2186° / 71°0
86 °
Zanja Blanca, Friday, 21 August
Clear. High 86°, low 71°.
Pressure30.03 inHg
Wind13.6 mph SE
Humidity50%
Visibility—
Dew point63°
Sat, 2286° / 71°0.02
86 °
Zanja Blanca, Saturday, 22 August
Light rain. High 86°, low 71°.
Pressure30.03 inHg
Wind14.2 mph SE
Humidity53%
Visibility—
Dew point65°
Sun, 2386° / 73°0.02
86 °
Zanja Blanca, Sunday, 23 August
Light rain. High 86°, low 73°.
Pressure30.06 inHg
Wind14.9 mph SE
Humidity47%
Visibility—
Dew point61°
Mon, 2488° / 73°0
88 °
Zanja Blanca, Monday, 24 August
Mostly clear. High 88°, low 73°.
Pressure30.06 inHg
Wind16.4 mph SE
Humidity46%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2587° / 75°0.15
87 °
Zanja Blanca, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.15 in
Chance of precipitation62%
Record high94° (1966)
Record low70° (2024)
Wed, 2687° / 75°0.11
87 °
Zanja Blanca, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.11 in
Chance of precipitation70%
Record high92° (1990)
Record low73° (1972)
Thu, 2787° / 75°0.1
87 °
Zanja Blanca, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.1 in
Chance of precipitation57%
Record high93° (1990)
Record low73° (2012)
Fri, 2887° / 75°0.14
87 °
Zanja Blanca, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.14 in
Chance of precipitation73%
Record high94° (2021)
Record low73° (1983)
Sat, 2987° / 75°0.09
87 °
Zanja Blanca, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.09 in
Chance of precipitation55%
Record high94° (2021)
Record low73° (1961)
Sun, 3087° / 75°0.2
87 °
Zanja Blanca, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.2 in
Chance of precipitation57%
Record high92° (1967)
Record low72° (2025)
Mon, 3187° / 75°0.15
87 °
Zanja Blanca, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.15 in
Chance of precipitation67%
Record high93° (1996)
Record low72° (2025)
Tue, 0187° / 75°0.1
87 °
Zanja Blanca, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.1 in
Chance of precipitation68%
Record high92° (1996)
Record low72° (1976)
Wed, 0287° / 75°0.12
87 °
Zanja Blanca, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.12 in
Chance of precipitation75%
Record high92° (1967)
Record low71° (1981)
Thu, 0387° / 75°0.12
87 °
Zanja Blanca, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.12 in
Chance of precipitation60%
Record high93° (2021)
Record low73° (1965)
Fri, 0487° / 75°0.14
87 °
Zanja Blanca, Friday, 4 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.14 in
Chance of precipitation62%
Record high94° (2021)
Record low71° (2025)
Sat, 0587° / 75°0.25
87 °
Zanja Blanca, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.25 in
Chance of precipitation58%
Record high95° (2021)
Record low70° (1961)
Sun, 0687° / 75°0.13
87 °
Zanja Blanca, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.13 in
Chance of precipitation60%
Record high95° (2021)
Record low71° (1983)
Mon, 0787° / 75°0.19
87 °
Zanja Blanca, Monday, 7 September
Climate normal for this date — 60-year average.
Average high87°
Average low75°
Average precipitation0.19 in
Chance of precipitation62%
Record high94° (2021)
Record low71° (2025)
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 Zanja Blanca, 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 Zanja Blanca, 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.