Monthly outlook for Mariana, PR: average high 88.6°, average low 75°. That is 0.5° above the climate normal for August. Precipitation is expected on 7 days (about 1.0 inches), against a normal of 12 days and 2.5 inches. The warmest day looks like 9 August (90.3°), the coolest 23 August (73.5°).
88.6°/75°
Average high / low
+0.5°
Above normal
7 / 12
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
88.6°
87.7°
+0.5°
18 August – 27 August
88.7°
87.7°
+0.5°
28 August – 6 September
at normal
87.9°
—
August records over 66 years
94.3°16 August 2022All-time high
71.2°23 August 2022All-time low
Climate normals and records are computed from the nearest reference point — Trujillo Alto (4 mi).
Sun, 0990° / 75°0.03
90 °
Mariana, Sunday, 9 August
Light rain. High 90°, low 75°.
Pressure30.03 inHg
Wind15.9 mph E
Humidity57%
Visibility6.2 mi
Dew point71°
Mon, 1090° / 76°0.01
90 °
Mariana, Monday, 10 August
Light rain. High 90°, low 76°.
Pressure30.06 inHg
Wind14.8 mph E
Humidity52%
Visibility6.2 mi
Dew point69°
Tue, 1188° / 74°0.07
88 °
Mariana, Tuesday, 11 August
Light rain. High 88°, low 74°.
Pressure30.06 inHg
Wind13.5 mph E
Humidity56%
Visibility6.2 mi
Dew point70°
Wed, 1289° / 75°0.07
89 °
Mariana, Wednesday, 12 August
Light rain. High 89°, low 75°.
Pressure30.03 inHg
Wind14.8 mph SE
Humidity57%
Visibility6.2 mi
Dew point70°
Thu, 1387° / 75°0.05
87 °
Mariana, Thursday, 13 August
Light rain. High 87°, low 75°.
Pressure30.06 inHg
Wind18.3 mph E
Humidity60%
Visibility—
Dew point69°
Fri, 1488° / 75°0.04
88 °
Mariana, Friday, 14 August
Light rain. High 88°, low 75°.
Pressure30.12 inHg
Wind17.4 mph E
Humidity58%
Visibility—
Dew point68°
Sat, 1588° / 75°0.03
88 °
Mariana, Saturday, 15 August
Light rain. High 88°, low 75°.
Pressure30.09 inHg
Wind18.5 mph E
Humidity54%
Visibility—
Dew point67°
Sun, 1688° / 75°0.06
88 °
Mariana, Sunday, 16 August
Light rain. High 88°, low 75°.
Pressure30.09 inHg
Wind18.2 mph E
Humidity54%
Visibility—
Dew point67°
Mon, 1789° / 75°0.1
89 °
Mariana, Monday, 17 August
Light rain. High 89°, low 75°.
Pressure30.03 inHg
Wind15 mph E
Humidity63%
Visibility—
Dew point71°
Tue, 1886° / 76°0.4
86 °
Mariana, Tuesday, 18 August
Rain. High 86°, low 76°.
Pressure29.97 inHg
Wind11.2 mph NE
Humidity69%
Visibility—
Dew point72°
Wed, 1990° / 74°0.09
90 °
Mariana, Wednesday, 19 August
Light rain. High 90°, low 74°.
Pressure30.00 inHg
Wind14.4 mph SE
Humidity61%
Visibility—
Dew point71°
Thu, 2090° / 76°0.03
90 °
Mariana, Thursday, 20 August
Light rain. High 90°, low 76°.
Pressure30.03 inHg
Wind11.4 mph SE
Humidity60%
Visibility—
Dew point70°
Fri, 2189° / 75°0.01
89 °
Mariana, Friday, 21 August
Light rain. High 89°, low 75°.
Pressure30.06 inHg
Wind13.4 mph SE
Humidity70%
Visibility—
Dew point73°
Sat, 2288° / 74°0.02
88 °
Mariana, Saturday, 22 August
Light rain. High 88°, low 74°.
Pressure30.03 inHg
Wind14.3 mph SE
Humidity66%
Visibility—
Dew point71°
Sun, 2389° / 73°0.02
89 °
Mariana, Sunday, 23 August
Light rain. High 89°, low 73°.
Pressure30.00 inHg
Wind14 mph SE
Humidity52%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 76°0.23
87 °
Mariana, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low76°
Average precipitation0.23 in
Chance of precipitation75%
Record high94° (2023)
Record low73° (2017)
Tue, 2588° / 76°0.16
88 °
Mariana, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.16 in
Chance of precipitation77%
Record high92° (2019)
Record low73° (1972)
Wed, 2688° / 76°0.14
88 °
Mariana, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.14 in
Chance of precipitation78%
Record high94° (2019)
Record low73° (2021)
Thu, 2788° / 76°0.13
88 °
Mariana, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.13 in
Chance of precipitation77%
Record high93° (2023)
Record low74° (1967)
Fri, 2888° / 76°0.19
88 °
Mariana, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.19 in
Chance of precipitation92%
Record high94° (2023)
Record low73° (2017)
Sat, 2988° / 76°0.13
88 °
Mariana, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.13 in
Chance of precipitation73%
Record high93° (2023)
Record low74° (1978)
Sun, 3088° / 76°0.24
88 °
Mariana, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.24 in
Chance of precipitation75%
Record high94° (2023)
Record low73° (2018)
Mon, 3188° / 76°0.16
88 °
Mariana, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.16 in
Chance of precipitation82%
Record high93° (2023)
Record low72° (2021)
Tue, 0188° / 76°0.17
88 °
Mariana, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.17 in
Chance of precipitation82%
Record high92° (2023)
Record low73° (2021)
Wed, 0288° / 76°0.16
88 °
Mariana, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.16 in
Chance of precipitation85%
Record high93° (2023)
Record low73° (1986)
Thu, 0388° / 76°0.14
88 °
Mariana, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.14 in
Chance of precipitation77%
Record high92° (1991)
Record low73° (1972)
Fri, 0488° / 76°0.14
88 °
Mariana, Friday, 4 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.14 in
Chance of precipitation70%
Record high93° (2021)
Record low73° (1982)
Sat, 0588° / 76°0.29
88 °
Mariana, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.29 in
Chance of precipitation85%
Record high95° (2023)
Record low72° (1961)
Sun, 0688° / 76°0.22
88 °
Mariana, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.22 in
Chance of precipitation80%
Record high93° (2012)
Record low73° (1971)
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 Mariana, 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 Mariana, 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.