Monthly outlook for Zanja Negra, PR: average high 81.1°, average low 70.5°. That is 1.4° below the climate normal for October. Precipitation is expected on 15 days (about 3.4 inches), against a normal of 11 days and 2.5 inches. The warmest day looks like 25 October (85.7°), the coolest 28 October (68.1°).
81.1°/70.5°
Average high / low
−1.4°
Below normal
15 / 11
Wet days / normal
3.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
81.3°
83.9°
-1.5°
4 November – 13 November
80.9°
83.3°
-1.3°
14 November – 23 November
at normal
83.1°
—
October records over 66 years
92.3°2 October 2023All-time high
68°2 October 2025All-time low
Climate normals and records are computed from the nearest reference point — Coamo (3 mi).
Mon, 2684° / 74°0.23
84 °
Zanja Negra, Monday, 26 October
Rain. High 84°, low 74°.
Pressure29.97 inHg
Wind9.8 mph SE
Humidity71%
Visibility5.0 mi
Dew point71°
Tue, 2779° / 70°0.09
79 °
Zanja Negra, Tuesday, 27 October
Light rain. High 79°, low 70°.
Pressure30.00 inHg
Wind6.4 mph S
Humidity79%
Visibility6.2 mi
Dew point72°
Wed, 2880° / 68°0.1
80 °
Zanja Negra, Wednesday, 28 October
Light rain. High 80°, low 68°.
Pressure30.00 inHg
Wind5.9 mph SE
Humidity75%
Visibility4.6 mi
Dew point71°
Thu, 2981° / 69°0.01
81 °
Zanja Negra, Thursday, 29 October
Light rain. High 81°, low 69°.
Pressure29.97 inHg
Wind6.6 mph SE
Humidity67%
Visibility6.2 mi
Dew point70°
Fri, 3081° / 69°0.17
81 °
Zanja Negra, Friday, 30 October
Light rain. High 81°, low 69°.
Pressure29.97 inHg
Wind6.6 mph SE
Humidity65%
Visibility—
Dew point67°
Sat, 3183° / 69°0.19
83 °
Zanja Negra, Saturday, 31 October
Light rain. High 83°, low 69°.
Pressure29.94 inHg
Wind10.2 mph SE
Humidity61%
Visibility—
Dew point66°
Sun, 0183° / 72°0.42
83 °
Zanja Negra, Sunday, 1 November
Rain. High 83°, low 72°.
Pressure29.97 inHg
Wind9.6 mph SE
Humidity59%
Visibility—
Dew point65°
Mon, 0277° / 69°0.8
77 °
Zanja Negra, Monday, 2 November
Rain. High 77°, low 69°.
Pressure29.97 inHg
Wind7.1 mph SE
Humidity74%
Visibility—
Dew point65°
Tue, 0379° / 71°0.5
79 °
Zanja Negra, Tuesday, 3 November
Rain. High 79°, low 71°.
Pressure29.91 inHg
Wind8.6 mph SE
Humidity73%
Visibility—
Dew point68°
Wed, 0480° / 70°0.2
80 °
Zanja Negra, Wednesday, 4 November
Light rain. High 80°, low 70°.
Pressure29.94 inHg
Wind5.8 mph S
Humidity72%
Visibility—
Dew point69°
Thu, 0582° / 71°0.22
82 °
Zanja Negra, Thursday, 5 November
Light rain. High 82°, low 71°.
Pressure29.94 inHg
Wind5 mph S
Humidity61%
Visibility—
Dew point66°
Fri, 0682° / 71°0.19
82 °
Zanja Negra, Friday, 6 November
Rain. High 82°, low 71°.
Pressure29.94 inHg
Wind4.7 mph S
Humidity62%
Visibility—
Dew point66°
Sat, 0781° / 71°0.11
81 °
Zanja Negra, Saturday, 7 November
Light rain. High 81°, low 71°.
Pressure29.94 inHg
Wind4.5 mph S
Humidity64%
Visibility—
Dew point66°
Sun, 0881° / 70°0.07
81 °
Zanja Negra, Sunday, 8 November
Light rain. High 81°, low 70°.
Pressure29.91 inHg
Wind5.8 mph S
Humidity64%
Visibility—
Dew point66°
Mon, 0980° / 70°0.08
80 °
Zanja Negra, Monday, 9 November
Light rain. High 80°, low 70°.
Pressure29.91 inHg
Wind6 mph S
Humidity69%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1083° / 73°0.15
83 °
Zanja Negra, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.15 in
Chance of precipitation77%
Record high87° (2025)
Record low68° (1984)
Wed, 1183° / 73°0.16
83 °
Zanja Negra, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.16 in
Chance of precipitation55%
Record high89° (2021)
Record low67° (1984)
Thu, 1283° / 73°0.14
83 °
Zanja Negra, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.14 in
Chance of precipitation48%
Record high91° (2021)
Record low67° (1963)
Fri, 1383° / 73°0.11
83 °
Zanja Negra, Friday, 13 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.11 in
Chance of precipitation60%
Record high89° (2021)
Record low67° (1984)
Sat, 1483° / 73°0.07
83 °
Zanja Negra, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.07 in
Chance of precipitation55%
Record high89° (2021)
Record low67° (1966)
Sun, 1583° / 73°0.1
83 °
Zanja Negra, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.1 in
Chance of precipitation55%
Record high88° (2019)
Record low67° (2025)
Mon, 1683° / 72°0.09
83 °
Zanja Negra, Monday, 16 November
Climate normal for this date — 60-year average.
Average high83°
Average low72°
Average precipitation0.09 in
Chance of precipitation57%
Record high92° (2021)
Record low67° (1966)
Tue, 1783° / 73°0.13
83 °
Zanja Negra, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.13 in
Chance of precipitation57%
Record high90° (2021)
Record low67° (2025)
Wed, 1883° / 73°0.1
83 °
Zanja Negra, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.1 in
Chance of precipitation57%
Record high88° (2021)
Record low65° (1970)
Thu, 1983° / 73°0.1
83 °
Zanja Negra, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high83°
Average low73°
Average precipitation0.1 in
Chance of precipitation60%
Record high91° (2021)
Record low68° (1961)
Fri, 2083° / 72°0.07
83 °
Zanja Negra, Friday, 20 November
Climate normal for this date — 60-year average.
Average high83°
Average low72°
Average precipitation0.07 in
Chance of precipitation48%
Record high92° (2021)
Record low69° (1969)
Sat, 2183° / 72°0.08
83 °
Zanja Negra, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high83°
Average low72°
Average precipitation0.08 in
Chance of precipitation55%
Record high88° (2018)
Record low68° (1971)
Sun, 2283° / 72°0.14
83 °
Zanja Negra, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high83°
Average low72°
Average precipitation0.14 in
Chance of precipitation68%
Record high88° (1989)
Record low67° (1971)
Mon, 2383° / 72°0.1
83 °
Zanja Negra, Monday, 23 November
Climate normal for this date — 60-year average.
Average high83°
Average low72°
Average precipitation0.1 in
Chance of precipitation57%
Record high89° (1995)
Record low67° (2025)
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 Zanja Negra, 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 Zanja Negra, 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.