Monthly outlook for San Isidro, PR: average high 86.7°, average low 76.7°. That is 2° above the climate normal for November. Precipitation is expected on 11 days (about 1.9 inches), against a normal of 11 days and 2.2 inches. The warmest day looks like 15 November (91.3°), the coolest 26 November (73.7°).
86.7°/76.7°
Average high / low
+2°
Above normal
11 / 11
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 November – 21 November
87.8°
83.2°
+2.5°
22 November – 1 December
84.8°
82.4°
+1.3°
2 December – 11 December
at normal
81.7°
—
November records over 66 years
91.4°3 November 1960All-time high
68°24 November 1963All-time low
Fri, 1391° / 79°0
91 °
San Isidro, Friday, 13 November
Mostly clear. High 91°, low 79°.
Pressure29.97 inHg
Wind11.3 mph SE
Humidity51%
Visibility6.2 mi
Dew point70°
Sat, 1490° / 80°0.18
90 °
San Isidro, Saturday, 14 November
Rain. High 90°, low 80°.
Pressure29.97 inHg
Wind12.4 mph S
Humidity65%
Visibility6.2 mi
Dew point76°
Sun, 1591° / 78°0
91 °
San Isidro, Sunday, 15 November
Overcast. High 91°, low 78°.
Pressure30.03 inHg
Wind4.1 mph SE
Humidity51%
Visibility6.2 mi
Dew point70°
Mon, 1688° / 77°0.12
88 °
San Isidro, Monday, 16 November
Light rain. High 88°, low 77°.
Pressure30.00 inHg
Wind9.6 mph NE
Humidity68%
Visibility6.2 mi
Dew point74°
Tue, 1787° / 79°0.25
87 °
San Isidro, Tuesday, 17 November
Light rain. High 87°, low 79°.
Pressure30.00 inHg
Wind10 mph E
Humidity61%
Visibility—
Dew point71°
Wed, 1885° / 77°0.06
85 °
San Isidro, Wednesday, 18 November
Light rain. High 85°, low 77°.
Pressure29.94 inHg
Wind11 mph E
Humidity72%
Visibility—
Dew point74°
Thu, 1985° / 76°0.01
85 °
San Isidro, Thursday, 19 November
Light rain. High 85°, low 76°.
Pressure29.94 inHg
Wind11.8 mph SE
Humidity69%
Visibility—
Dew point72°
Fri, 2086° / 77°0.02
86 °
San Isidro, Friday, 20 November
Light rain. High 86°, low 77°.
Pressure29.97 inHg
Wind11.1 mph SE
Humidity65%
Visibility—
Dew point71°
Sat, 2185° / 77°0.02
85 °
San Isidro, Saturday, 21 November
Light rain. High 85°, low 77°.
Pressure29.97 inHg
Wind9.3 mph E
Humidity74%
Visibility—
Dew point73°
Sun, 2285° / 76°0.08
85 °
San Isidro, Sunday, 22 November
Light rain. High 85°, low 76°.
Pressure29.94 inHg
Wind10.5 mph E
Humidity67%
Visibility—
Dew point72°
Mon, 2385° / 76°0.06
85 °
San Isidro, Monday, 23 November
Light rain. High 85°, low 76°.
Pressure29.97 inHg
Wind9.8 mph E
Humidity61%
Visibility—
Dew point69°
Tue, 2484° / 76°0.18
84 °
San Isidro, Tuesday, 24 November
Light rain. High 84°, low 76°.
Pressure29.94 inHg
Wind7.6 mph E
Humidity67%
Visibility—
Dew point71°
Wed, 2585° / 75°0.26
85 °
San Isidro, Wednesday, 25 November
Light rain. High 85°, low 75°.
Pressure29.91 inHg
Wind9.7 mph E
Humidity68%
Visibility—
Dew point70°
Thu, 2686° / 74°0.15
86 °
San Isidro, Thursday, 26 November
Light rain. High 86°, low 74°.
Pressure29.85 inHg
Wind7.9 mph SE
Humidity65%
Visibility—
Dew point69°
Fri, 2784° / 75°0.46
84 °
San Isidro, Friday, 27 November
Rain. High 84°, low 75°.
Pressure29.91 inHg
Wind8.5 mph E
Humidity68%
Visibility—
Dew point71°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2882° / 74°0.11
82 °
San Isidro, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high82°
Average low74°
Average precipitation0.11 in
Chance of precipitation68%
Record high87° (2024)
Record low69° (1970)
Sun, 2982° / 73°0.08
82 °
San Isidro, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.08 in
Chance of precipitation63%
Record high86° (2021)
Record low70° (1970)
Mon, 3082° / 73°0.09
82 °
San Isidro, Monday, 30 November
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation63%
Record high88° (2024)
Record low69° (1964)
Tue, 0182° / 73°0.1
82 °
San Isidro, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.1 in
Chance of precipitation63%
Record high87° (2024)
Record low69° (1969)
Wed, 0282° / 73°0.09
82 °
San Isidro, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation63%
Record high87° (2019)
Record low69° (1969)
Thu, 0382° / 73°0.08
82 °
San Isidro, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.08 in
Chance of precipitation62%
Record high87° (2024)
Record low70° (2010)
Fri, 0482° / 73°0.1
82 °
San Isidro, Friday, 4 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.1 in
Chance of precipitation73%
Record high87° (1962)
Record low68° (2022)
Sat, 0582° / 73°0.11
82 °
San Isidro, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.11 in
Chance of precipitation60%
Record high86° (2024)
Record low69° (1996)
Sun, 0682° / 73°0.08
82 °
San Isidro, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.08 in
Chance of precipitation58%
Record high88° (2023)
Record low69° (1996)
Mon, 0782° / 73°0.09
82 °
San Isidro, Monday, 7 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation55%
Record high86° (2023)
Record low70° (1980)
Tue, 0882° / 73°0.09
82 °
San Isidro, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation57%
Record high86° (2023)
Record low69° (2022)
Wed, 0982° / 73°0.09
82 °
San Isidro, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation53%
Record high86° (2024)
Record low69° (1982)
Thu, 1081° / 73°0.09
81 °
San Isidro, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high81°
Average low73°
Average precipitation0.09 in
Chance of precipitation58%
Record high86° (1989)
Record low67° (2022)
Fri, 1182° / 73°0.09
82 °
San Isidro, Friday, 11 December
Climate normal for this date — 60-year average.
Average high82°
Average low73°
Average precipitation0.09 in
Chance of precipitation55%
Record high86° (2025)
Record low69° (2022)
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 San Isidro, 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 San Isidro, 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.