Monthly outlook for Las Guaras, PR: average high 90°, average low 76.3°. That is 0.8° above the climate normal for August. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 8 days and 1.7 inches. The warmest day looks like 15 August (93.1°), the coolest 15 August (73.5°).
90°/76.3°
Average high / low
+0.8°
Above normal
4 / 8
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
90.6°
88.7°
+1°
18 August – 27 August
89.1°
88.3°
+0.5°
28 August – 6 September
at normal
87.9°
—
August records over 66 years
94.8°7 August 2009All-time high
68.4°7 August 2025All-time low
Climate normals and records are computed from the nearest reference point — Sabana Grande (2 mi).
Sun, 0989° / 77°0.03
89 °
Las Guaras, Sunday, 9 August
Light rain. High 89°, low 77°.
Pressure30.00 inHg
Wind17.5 mph SE
Humidity58%
Visibility6.2 mi
Dew point72°
Mon, 1093° / 79°0
93 °
Las Guaras, Monday, 10 August
Clear. High 93°, low 79°.
Pressure30.03 inHg
Wind18.8 mph SE
Humidity49%
Visibility6.2 mi
Dew point69°
Tue, 1189° / 76°0.23
89 °
Las Guaras, Tuesday, 11 August
Rain. High 89°, low 76°.
Pressure30.00 inHg
Wind17.8 mph SE
Humidity58%
Visibility6.2 mi
Dew point71°
Wed, 1289° / 76°0.03
89 °
Las Guaras, Wednesday, 12 August
Light rain. High 89°, low 76°.
Pressure30.00 inHg
Wind16.6 mph SE
Humidity56%
Visibility6.2 mi
Dew point71°
Thu, 1390° / 77°0
90 °
Las Guaras, Thursday, 13 August
Overcast. High 90°, low 77°.
Pressure30.03 inHg
Wind20.4 mph SE
Humidity54%
Visibility—
Dew point68°
Fri, 1491° / 75°0
91 °
Las Guaras, Friday, 14 August
Partly cloudy. High 91°, low 75°.
Pressure30.09 inHg
Wind19.6 mph SE
Humidity45%
Visibility—
Dew point64°
Sat, 1593° / 74°0
93 °
Las Guaras, Saturday, 15 August
Clear. High 93°, low 74°.
Pressure30.03 inHg
Wind23.8 mph SE
Humidity40%
Visibility—
Dew point63°
Sun, 1691° / 77°0
91 °
Las Guaras, Sunday, 16 August
Light rain. High 91°, low 77°.
Pressure30.00 inHg
Wind15.8 mph SE
Humidity47%
Visibility—
Dew point66°
Mon, 1791° / 76°0.52
91 °
Las Guaras, Monday, 17 August
Rain. High 91°, low 76°.
Pressure30.00 inHg
Wind10.1 mph SE
Humidity48%
Visibility—
Dew point67°
Tue, 1888° / 77°0.16
88 °
Las Guaras, Tuesday, 18 August
Light rain. High 88°, low 77°.
Pressure30.03 inHg
Wind12 mph S
Humidity61%
Visibility—
Dew point71°
Wed, 1989° / 78°0.02
89 °
Las Guaras, Wednesday, 19 August
Light rain. High 89°, low 78°.
Pressure30.03 inHg
Wind15.7 mph SE
Humidity59%
Visibility—
Dew point71°
Thu, 2089° / 78°0.02
89 °
Las Guaras, Thursday, 20 August
Light rain. High 89°, low 78°.
Pressure30.03 inHg
Wind13.4 mph SE
Humidity56%
Visibility—
Dew point70°
Fri, 2189° / 76°0.01
89 °
Las Guaras, Friday, 21 August
Light rain. High 89°, low 76°.
Pressure30.03 inHg
Wind15 mph SE
Humidity53%
Visibility—
Dew point68°
Sat, 2289° / 75°0.09
89 °
Las Guaras, Saturday, 22 August
Light rain. High 89°, low 75°.
Pressure30.00 inHg
Wind15.5 mph SE
Humidity56%
Visibility—
Dew point69°
Sun, 2390° / 75°0.01
90 °
Las Guaras, Sunday, 23 August
Light rain. High 90°, low 75°.
Pressure30.03 inHg
Wind17 mph SE
Humidity48%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2488° / 76°0.15
88 °
Las Guaras, Monday, 24 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.15 in
Chance of precipitation55%
Record high93° (2013)
Record low69° (2018)
Tue, 2588° / 76°0.12
88 °
Las Guaras, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.12 in
Chance of precipitation50%
Record high92° (1960)
Record low69° (2024)
Wed, 2688° / 76°0.11
88 °
Las Guaras, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation52%
Record high94° (1990)
Record low71° (2023)
Thu, 2788° / 76°0.09
88 °
Las Guaras, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.09 in
Chance of precipitation55%
Record high94° (1990)
Record low71° (2020)
Fri, 2888° / 76°0.11
88 °
Las Guaras, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation52%
Record high92° (1992)
Record low72° (2024)
Sat, 2988° / 76°0.06
88 °
Las Guaras, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.06 in
Chance of precipitation47%
Record high92° (1985)
Record low72° (2020)
Sun, 3088° / 76°0.16
88 °
Las Guaras, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.16 in
Chance of precipitation52%
Record high94° (1994)
Record low70° (2025)
Mon, 3188° / 76°0.12
88 °
Las Guaras, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.12 in
Chance of precipitation38%
Record high93° (1960)
Record low73° (2021)
Tue, 0188° / 76°0.11
88 °
Las Guaras, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation55%
Record high93° (2009)
Record low71° (2022)
Wed, 0288° / 76°0.11
88 °
Las Guaras, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation57%
Record high94° (2009)
Record low71° (2022)
Thu, 0388° / 76°0.11
88 °
Las Guaras, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.11 in
Chance of precipitation55%
Record high93° (2009)
Record low72° (2022)
Fri, 0488° / 76°0.1
88 °
Las Guaras, Friday, 4 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.1 in
Chance of precipitation52%
Record high92° (1989)
Record low73° (2022)
Sat, 0588° / 76°0.21
88 °
Las Guaras, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.21 in
Chance of precipitation45%
Record high92° (2021)
Record low70° (2024)
Sun, 0688° / 76°0.12
88 °
Las Guaras, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low76°
Average precipitation0.12 in
Chance of precipitation53%
Record high92° (1997)
Record low72° (2024)
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 Guaras, 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 Guaras, 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.