Monthly outlook for Las Marías, PR: average high 88.6°, average low 78.2°. That is 0.3° above the climate normal for August. Precipitation is expected on 8 days (about 1.7 inches), against a normal of 11 days and 2.1 inches. The warmest day looks like 10 August (95.6°), the coolest 9 August (76.4°).
88.6°/78.2°
Average high / low
+0.3°
Above normal
8 / 11
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
90.1°
88.1°
+1.2°
18 August – 27 August
86.1°
87.8°
-1°
28 August – 6 September
at normal
87.4°
—
August records over 66 years
93.2°14 August 2023All-time high
70.2°2 August 2018All-time low
Sun, 0993° / 76°0.12
93 °
Las Marías, Sunday, 9 August
Light rain. High 93°, low 76°.
Pressure30.03 inHg
Wind9.4 mph NE
Humidity68%
Visibility6.2 mi
Dew point75°
Mon, 1096° / 77°0.02
96 °
Las Marías, Monday, 10 August
Light rain. High 96°, low 77°.
Pressure30.03 inHg
Wind6 mph W
Humidity60%
Visibility6.2 mi
Dew point72°
Tue, 1188° / 78°0.38
88 °
Las Marías, Tuesday, 11 August
Rain. High 88°, low 78°.
Pressure30.00 inHg
Wind6.7 mph SW
Humidity66%
Visibility6.2 mi
Dew point73°
Wed, 1287° / 78°0.13
87 °
Las Marías, Wednesday, 12 August
Light rain. High 87°, low 78°.
Pressure30.00 inHg
Wind4.4 mph W
Humidity61%
Visibility6.2 mi
Dew point72°
Thu, 1390° / 78°0
90 °
Las Marías, Thursday, 13 August
Overcast. High 90°, low 78°.
Pressure30.03 inHg
Wind9.4 mph E
Humidity60%
Visibility—
Dew point70°
Fri, 1491° / 77°0
91 °
Las Marías, Friday, 14 August
Overcast. High 91°, low 77°.
Pressure30.09 inHg
Wind18.9 mph NE
Humidity57%
Visibility—
Dew point69°
Sat, 1590° / 79°0.01
90 °
Las Marías, Saturday, 15 August
Light rain. High 90°, low 79°.
Pressure30.03 inHg
Wind24.9 mph NE
Humidity53%
Visibility—
Dew point69°
Sun, 1688° / 79°0
88 °
Las Marías, Sunday, 16 August
Overcast. High 88°, low 79°.
Pressure30.03 inHg
Wind12.8 mph NE
Humidity57%
Visibility—
Dew point69°
Mon, 1788° / 79°0.47
88 °
Las Marías, Monday, 17 August
Rain. High 88°, low 79°.
Pressure30.00 inHg
Wind14.9 mph E
Humidity59%
Visibility—
Dew point71°
Tue, 1886° / 79°0.38
86 °
Las Marías, Tuesday, 18 August
Rain. High 86°, low 79°.
Pressure30.03 inHg
Wind8.4 mph E
Humidity67%
Visibility—
Dew point73°
Wed, 1989° / 79°0.06
89 °
Las Marías, Wednesday, 19 August
Light rain. High 89°, low 79°.
Pressure30.03 inHg
Wind10.7 mph SE
Humidity59%
Visibility—
Dew point71°
Thu, 2087° / 79°0.02
87 °
Las Marías, Thursday, 20 August
Light rain. High 87°, low 79°.
Pressure30.03 inHg
Wind13.6 mph N
Humidity63%
Visibility—
Dew point72°
Fri, 2184° / 78°0.01
84 °
Las Marías, Friday, 21 August
Light rain. High 84°, low 78°.
Pressure30.03 inHg
Wind13.3 mph NW
Humidity69%
Visibility—
Dew point72°
Sat, 2284° / 78°0.08
84 °
Las Marías, Saturday, 22 August
Light rain. High 84°, low 78°.
Pressure30.00 inHg
Wind12.8 mph NW
Humidity68%
Visibility—
Dew point71°
Sun, 2386° / 77°0
86 °
Las Marías, Sunday, 23 August
Partly cloudy. High 86°, low 77°.
Pressure30.03 inHg
Wind13.9 mph NW
Humidity59%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 78°0.19
87 °
Las Marías, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.19 in
Chance of precipitation75%
Record high92° (2025)
Record low73° (2018)
Tue, 2588° / 78°0.13
88 °
Las Marías, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.13 in
Chance of precipitation68%
Record high91° (1968)
Record low71° (2018)
Wed, 2688° / 78°0.16
88 °
Las Marías, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.16 in
Chance of precipitation63%
Record high91° (2025)
Record low73° (2018)
Thu, 2788° / 78°0.13
88 °
Las Marías, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.13 in
Chance of precipitation77%
Record high91° (2024)
Record low74° (2021)
Fri, 2887° / 78°0.15
87 °
Las Marías, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.15 in
Chance of precipitation80%
Record high92° (2023)
Record low74° (2022)
Sat, 2987° / 78°0.11
87 °
Las Marías, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.11 in
Chance of precipitation67%
Record high92° (2024)
Record low74° (2022)
Sun, 3088° / 78°0.19
88 °
Las Marías, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.19 in
Chance of precipitation75%
Record high91° (1994)
Record low74° (2022)
Mon, 3187° / 78°0.15
87 °
Las Marías, Monday, 31 August
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.15 in
Chance of precipitation75%
Record high92° (2023)
Record low73° (2021)
Tue, 0188° / 78°0.15
88 °
Las Marías, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.15 in
Chance of precipitation67%
Record high91° (2023)
Record low74° (2018)
Wed, 0287° / 78°0.15
87 °
Las Marías, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.15 in
Chance of precipitation80%
Record high91° (2025)
Record low73° (2021)
Thu, 0387° / 78°0.12
87 °
Las Marías, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.12 in
Chance of precipitation72%
Record high92° (2024)
Record low74° (2019)
Fri, 0488° / 78°0.13
88 °
Las Marías, Friday, 4 September
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.13 in
Chance of precipitation72%
Record high91° (2021)
Record low72° (2018)
Sat, 0587° / 78°0.23
87 °
Las Marías, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.23 in
Chance of precipitation68%
Record high93° (2023)
Record low72° (2018)
Sun, 0687° / 78°0.15
87 °
Las Marías, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high87°
Average low78°
Average precipitation0.15 in
Chance of precipitation70%
Record high91° (2023)
Record low72° (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 Las Marías, 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 Las Marías, 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.