Monthly outlook for Santurce, PR: average high 89.3°, average low 77.3°. That is 0.7° above the climate normal for August. Precipitation is expected on 10 days (about 1.7 inches), against a normal of 11 days and 2.1 inches. The warmest day looks like 15 August (92.3°), the coolest 9 August (75.5°).
89.3°/77.3°
Average high / low
+0.7°
Above normal
10 / 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
90.3°
88.1°
+1.2°
18 August – 27 August
87.7°
87.8°
-0.1°
28 August – 6 September
at normal
87.5°
—
August records over 66 years
93.2°14 August 2023All-time high
70.2°2 August 2018All-time low
Climate normals and records are computed from the nearest reference point — Añasco (6 mi).
Sun, 0991° / 75°0.11
91 °
Santurce, Sunday, 9 August
Light rain. High 91°, low 75°.
Pressure30.00 inHg
Wind6.7 mph NE
Humidity62%
Visibility6.2 mi
Dew point73°
Mon, 1091° / 78°0.01
91 °
Santurce, Monday, 10 August
Light rain. High 91°, low 78°.
Pressure30.03 inHg
Wind7.4 mph SW
Humidity57%
Visibility6.2 mi
Dew point71°
Tue, 1188° / 77°0.53
88 °
Santurce, Tuesday, 11 August
Rain. High 88°, low 77°.
Pressure30.03 inHg
Wind10 mph SW
Humidity62%
Visibility6.2 mi
Dew point72°
Wed, 1286° / 77°0.09
86 °
Santurce, Wednesday, 12 August
Light rain. High 86°, low 77°.
Pressure30.00 inHg
Wind6.6 mph S
Humidity62%
Visibility6.2 mi
Dew point72°
Thu, 1390° / 78°0
90 °
Santurce, Thursday, 13 August
Overcast. High 90°, low 78°.
Pressure30.03 inHg
Wind10.1 mph SE
Humidity58%
Visibility—
Dew point70°
Fri, 1492° / 76°0
92 °
Santurce, Friday, 14 August
Overcast. High 92°, low 76°.
Pressure30.09 inHg
Wind11.6 mph NE
Humidity53%
Visibility—
Dew point67°
Sat, 1592° / 77°0
92 °
Santurce, Saturday, 15 August
Clear. High 92°, low 77°.
Pressure30.06 inHg
Wind13.2 mph NE
Humidity46%
Visibility—
Dew point65°
Sun, 1692° / 77°0.02
92 °
Santurce, Sunday, 16 August
Light rain. High 92°, low 77°.
Pressure30.03 inHg
Wind13.4 mph NE
Humidity54%
Visibility—
Dew point69°
Mon, 1790° / 78°0.49
90 °
Santurce, Monday, 17 August
Rain. High 90°, low 78°.
Pressure30.00 inHg
Wind11.5 mph NE
Humidity51%
Visibility—
Dew point68°
Tue, 1888° / 78°0.11
88 °
Santurce, Tuesday, 18 August
Light rain. High 88°, low 78°.
Pressure29.94 inHg
Wind11.9 mph NE
Humidity63%
Visibility—
Dew point73°
Wed, 1988° / 78°0.04
88 °
Santurce, Wednesday, 19 August
Light rain. High 88°, low 78°.
Pressure30.00 inHg
Wind17.9 mph S
Humidity62%
Visibility—
Dew point71°
Thu, 2089° / 79°0.04
89 °
Santurce, Thursday, 20 August
Light rain. High 89°, low 79°.
Pressure30.03 inHg
Wind10.4 mph SE
Humidity66%
Visibility—
Dew point74°
Fri, 2189° / 78°0.02
89 °
Santurce, Friday, 21 August
Light rain. High 89°, low 78°.
Pressure30.03 inHg
Wind10.2 mph SE
Humidity56%
Visibility—
Dew point69°
Sat, 2288° / 77°0.06
88 °
Santurce, Saturday, 22 August
Light rain. High 88°, low 77°.
Pressure30.00 inHg
Wind9.6 mph E
Humidity58%
Visibility—
Dew point70°
Sun, 2385° / 76°0.11
85 °
Santurce, Sunday, 23 August
Light rain. High 85°, low 76°.
Pressure30.00 inHg
Wind8.6 mph E
Humidity64%
Visibility—
Dew point70°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2488° / 78°0.19
88 °
Santurce, Monday, 24 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.19 in
Chance of precipitation75%
Record high92° (2025)
Record low73° (2018)
Tue, 2588° / 78°0.13
88 °
Santurce, 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 °
Santurce, 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 °
Santurce, 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, 2888° / 78°0.15
88 °
Santurce, Friday, 28 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.15 in
Chance of precipitation80%
Record high92° (2023)
Record low74° (2022)
Sat, 2988° / 78°0.11
88 °
Santurce, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.11 in
Chance of precipitation67%
Record high92° (2024)
Record low74° (2022)
Sun, 3088° / 78°0.19
88 °
Santurce, 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, 3188° / 78°0.15
88 °
Santurce, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.15 in
Chance of precipitation75%
Record high92° (2023)
Record low73° (2021)
Tue, 0188° / 78°0.15
88 °
Santurce, 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 °
Santurce, 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, 0388° / 78°0.12
88 °
Santurce, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high88°
Average low78°
Average precipitation0.12 in
Chance of precipitation72%
Record high92° (2024)
Record low74° (2019)
Fri, 0488° / 78°0.13
88 °
Santurce, 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 °
Santurce, 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 °
Santurce, 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 Santurce, 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 Santurce, 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.