Monthly outlook for Guayama, PR: average high 85.5°, average low 75.7°. That is 0.9° above the climate normal for October. Precipitation is expected on 14 days (about 2.6 inches), against a normal of 11 days and 2.6 inches. The warmest day looks like 11 October (87.2°), the coolest 12 October (72.6°).
85.5°/75.7°
Average high / low
+0.9°
Above normal
14 / 11
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
86°
84°
+1.1°
20 October – 29 October
84.6°
83.6°
+0.6°
30 October – 8 November
at normal
83°
—
October records over 66 years
93°2 October 2023All-time high
71.1°30 October 2018All-time low
Sun, 1187° / 75°0.17
87 °
Guayama, Sunday, 11 October
Rain. High 87°, low 75°.
Pressure30.00 inHg
Wind10.2 mph E
Humidity63%
Visibility6.2 mi
Dew point71°
Mon, 1286° / 73°0.11
86 °
Guayama, Monday, 12 October
Light rain. High 86°, low 73°.
Pressure29.94 inHg
Wind9.5 mph SE
Humidity63%
Visibility6.2 mi
Dew point72°
Tue, 1385° / 73°0.57
85 °
Guayama, Tuesday, 13 October
Rain. High 85°, low 73°.
Pressure29.91 inHg
Wind8.5 mph E
Humidity68%
Visibility6.2 mi
Dew point74°
Wed, 1485° / 73°0.06
85 °
Guayama, Wednesday, 14 October
Light rain. High 85°, low 73°.
Pressure29.97 inHg
Wind8.6 mph E
Humidity70%
Visibility—
Dew point72°
Thu, 1586° / 74°0.12
86 °
Guayama, Thursday, 15 October
Light rain. High 86°, low 74°.
Pressure29.97 inHg
Wind7.5 mph E
Humidity65%
Visibility—
Dew point72°
Fri, 1687° / 76°0.03
87 °
Guayama, Friday, 16 October
Light rain. High 87°, low 76°.
Pressure29.94 inHg
Wind11.6 mph E
Humidity67%
Visibility—
Dew point73°
Sat, 1786° / 78°0.22
86 °
Guayama, Saturday, 17 October
Rain. High 86°, low 78°.
Pressure29.94 inHg
Wind10.9 mph E
Humidity62%
Visibility—
Dew point70°
Sun, 1885° / 78°0.08
85 °
Guayama, Sunday, 18 October
Light rain. High 85°, low 78°.
Pressure29.97 inHg
Wind10.3 mph SE
Humidity70%
Visibility—
Dew point73°
Mon, 1987° / 78°0.12
87 °
Guayama, Monday, 19 October
Light rain. High 87°, low 78°.
Pressure29.94 inHg
Wind10.3 mph E
Humidity66%
Visibility—
Dew point72°
Tue, 2085° / 76°0.11
85 °
Guayama, Tuesday, 20 October
Light rain. High 85°, low 76°.
Pressure29.94 inHg
Wind9.1 mph SE
Humidity65%
Visibility—
Dew point71°
Wed, 2185° / 76°0.06
85 °
Guayama, Wednesday, 21 October
Light rain. High 85°, low 76°.
Pressure29.91 inHg
Wind6.7 mph S
Humidity67%
Visibility—
Dew point71°
Thu, 2285° / 75°0.09
85 °
Guayama, Thursday, 22 October
Light rain. High 85°, low 75°.
Pressure29.91 inHg
Wind9.7 mph SW
Humidity64%
Visibility—
Dew point70°
Fri, 2384° / 75°0
84 °
Guayama, Friday, 23 October
Clear. High 84°, low 75°.
Pressure29.94 inHg
Wind6.5 mph S
Humidity64%
Visibility—
Dew point69°
Sat, 2484° / 77°0.44
84 °
Guayama, Saturday, 24 October
Rain. High 84°, low 77°.
Pressure29.94 inHg
Wind9.6 mph SE
Humidity72%
Visibility—
Dew point73°
Sun, 2585° / 77°0.28
85 °
Guayama, Sunday, 25 October
Rain. High 85°, low 77°.
Pressure29.91 inHg
Wind11.2 mph S
Humidity71%
Visibility—
Dew point73°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2683° / 76°0.19
83 °
Guayama, Monday, 26 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.19 in
Chance of precipitation72%
Record high88° (2024)
Record low72° (1991)
Tue, 2783° / 76°0.19
83 °
Guayama, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.19 in
Chance of precipitation65%
Record high89° (2024)
Record low72° (1981)
Wed, 2883° / 76°0.18
83 °
Guayama, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.18 in
Chance of precipitation68%
Record high90° (2024)
Record low73° (1970)
Thu, 2983° / 76°0.15
83 °
Guayama, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.15 in
Chance of precipitation73%
Record high87° (2024)
Record low73° (2018)
Fri, 3083° / 76°0.17
83 °
Guayama, Friday, 30 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.17 in
Chance of precipitation68%
Record high86° (2019)
Record low71° (2018)
Sat, 3183° / 76°0.17
83 °
Guayama, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.17 in
Chance of precipitation70%
Record high87° (2019)
Record low73° (2024)
Sun, 0183° / 76°0.16
83 °
Guayama, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.16 in
Chance of precipitation62%
Record high86° (1960)
Record low71° (1976)
Mon, 0283° / 76°0.14
83 °
Guayama, Monday, 2 November
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.14 in
Chance of precipitation68%
Record high87° (2021)
Record low72° (2024)
Tue, 0383° / 76°0.14
83 °
Guayama, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.14 in
Chance of precipitation65%
Record high86° (1960)
Record low71° (1974)
Wed, 0483° / 75°0.15
83 °
Guayama, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high83°
Average low75°
Average precipitation0.15 in
Chance of precipitation63%
Record high87° (2021)
Record low72° (2000)
Thu, 0583° / 75°0.19
83 °
Guayama, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high83°
Average low75°
Average precipitation0.19 in
Chance of precipitation72%
Record high86° (1960)
Record low71° (2022)
Fri, 0683° / 76°0.19
83 °
Guayama, Friday, 6 November
Climate normal for this date — 60-year average.
Average high83°
Average low76°
Average precipitation0.19 in
Chance of precipitation68%
Record high86° (2021)
Record low73° (1974)
Sat, 0783° / 75°0.17
83 °
Guayama, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high83°
Average low75°
Average precipitation0.17 in
Chance of precipitation60%
Record high86° (2021)
Record low72° (2022)
Sun, 0883° / 75°0.16
83 °
Guayama, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high83°
Average low75°
Average precipitation0.16 in
Chance of precipitation72%
Record high86° (2021)
Record low72° (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 Guayama, 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 Guayama, 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.