Weather in San Isidro, PR
San Isidro, Sunday, 9 August, 05:33
Light rain. Feels like 80°. High 91°, low 80°.
Monthly outlook for San Isidro, PR: average high 88.2°, average low 77.4°. That is 0.8° above the climate normal for August. Precipitation is expected on 9 days (about 0.7 inches), against a normal of 12 days and 2.6 inches. The warmest day looks like 10 August (92.1°), the coolest 20 August (75.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 88.2° | 86.8° | +0.8° |
| 19 August – 28 August | 88.2° | 86.9° | +0.7° |
| 29 August – 7 September | at normal | 87.2° | — |
August records over 66 years
0San Isidro, Monday, 10 August
Light rain. High 92°, low 79°.
0.08San Isidro, Tuesday, 11 August
Light rain. High 87°, low 77°.
0.13San Isidro, Wednesday, 12 August
Light rain. High 87°, low 78°.
0.04San Isidro, Thursday, 13 August
Light rain. High 87°, low 78°.
0.06San Isidro, Friday, 14 August
Light rain. High 86°, low 79°.
0.04San Isidro, Saturday, 15 August
Light rain. High 87°, low 78°.
0.04San Isidro, Sunday, 16 August
Light rain. High 87°, low 77°.
0.01San Isidro, Monday, 17 August
Light rain. High 88°, low 77°.
0.02San Isidro, Tuesday, 18 August
Light rain. High 89°, low 76°.
0
San Isidro, Wednesday, 19 August
Clear. High 90°, low 76°.
0
San Isidro, Thursday, 20 August
Mostly clear. High 88°, low 75°.
0.09San Isidro, Friday, 21 August
Light rain. High 87°, low 76°.
0
San Isidro, Saturday, 22 August
Partly cloudy. High 89°, low 77°.
0.06San Isidro, Sunday, 23 August
Light rain. High 88°, low 77°.
0.09San Isidro, Monday, 24 August
Light rain. High 88°, low 78°.
0.16San Isidro, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.14San Isidro, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13San Isidro, Thursday, 27 August
Climate normal for this date — 60-year average.
0.2San Isidro, Friday, 28 August
Climate normal for this date — 60-year average.
0.13San Isidro, Saturday, 29 August
Climate normal for this date — 60-year average.
0.24San Isidro, Sunday, 30 August
Climate normal for this date — 60-year average.
0.17San Isidro, Monday, 31 August
Climate normal for this date — 60-year average.
0.16San Isidro, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.17San Isidro, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.14San Isidro, Thursday, 3 September
Climate normal for this date — 60-year average.
0.15San Isidro, Friday, 4 September
Climate normal for this date — 60-year average.
0.28San Isidro, Saturday, 5 September
Climate normal for this date — 60-year average.
0.24San Isidro, Sunday, 6 September
Climate normal for this date — 60-year average.
0.16San Isidro, Monday, 7 September
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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