Monthly outlook for Cayey, PR: average high 82.3°, average low 70.4°. That is 0.6° above the climate normal for October. Precipitation is expected on 16 days (about 4.0 inches), against a normal of 12 days and 2.7 inches. The warmest day looks like 9 October (90.7°), the coolest 19 October (68.3°).
82.3°/70.4°
Average high / low
+0.6°
Above normal
16 / 12
Wet days / normal
4.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
84.1°
81.4°
+1.5°
18 October – 27 October
79.4°
80.9°
-0.8°
28 October – 6 November
at normal
80.3°
—
October records over 66 years
86.5°12 October 2024All-time high
64.2°30 October 2018All-time low
Fri, 0991° / 74°0.06
91 °
Cayey, Friday, 9 October
Light rain. High 91°, low 74°.
Pressure30.03 inHg
Wind8.7 mph E
Humidity65%
Visibility6.2 mi
Dew point70°
Sat, 1082° / 71°0.2
82 °
Cayey, Saturday, 10 October
Rain. High 82°, low 71°.
Pressure30.03 inHg
Wind8.2 mph NE
Humidity81%
Visibility5.1 mi
Dew point72°
Sun, 1182° / 70°0.04
82 °
Cayey, Sunday, 11 October
Light rain. High 82°, low 70°.
Pressure30.03 inHg
Wind7 mph SE
Humidity66%
Visibility5.0 mi
Dew point69°
Mon, 1284° / 71°0.06
84 °
Cayey, Monday, 12 October
Light rain. High 84°, low 71°.
Pressure29.97 inHg
Wind6.7 mph E
Humidity64%
Visibility6.2 mi
Dew point69°
Tue, 1384° / 71°0.09
84 °
Cayey, Tuesday, 13 October
Light rain. High 84°, low 71°.
Pressure29.97 inHg
Wind4.2 mph E
Humidity65%
Visibility—
Dew point69°
Wed, 1484° / 71°0.14
84 °
Cayey, Wednesday, 14 October
Light rain. High 84°, low 71°.
Pressure29.94 inHg
Wind9.1 mph E
Humidity71%
Visibility—
Dew point70°
Thu, 1581° / 71°0.26
81 °
Cayey, Thursday, 15 October
Rain. High 81°, low 71°.
Pressure29.97 inHg
Wind4.5 mph NE
Humidity83%
Visibility—
Dew point70°
Fri, 1685° / 71°0.11
85 °
Cayey, Friday, 16 October
Light rain. High 85°, low 71°.
Pressure29.94 inHg
Wind9.1 mph E
Humidity65%
Visibility—
Dew point68°
Sat, 1784° / 70°0.24
84 °
Cayey, Saturday, 17 October
Light rain. High 84°, low 70°.
Pressure29.88 inHg
Wind7.9 mph E
Humidity58%
Visibility—
Dew point66°
Sun, 1877° / 70°0.52
77 °
Cayey, Sunday, 18 October
Rain. High 77°, low 70°.
Pressure29.88 inHg
Wind3 mph SE
Humidity87%
Visibility—
Dew point70°
Mon, 1980° / 68°0.61
80 °
Cayey, Monday, 19 October
Rain. High 80°, low 68°.
Pressure29.91 inHg
Wind5.9 mph SE
Humidity72%
Visibility—
Dew point69°
Tue, 2079° / 69°0.88
79 °
Cayey, Tuesday, 20 October
Rain. High 79°, low 69°.
Pressure29.91 inHg
Wind7 mph SE
Humidity74%
Visibility—
Dew point68°
Wed, 2179° / 69°0.4
79 °
Cayey, Wednesday, 21 October
Rain. High 79°, low 69°.
Pressure29.91 inHg
Wind6 mph S
Humidity74%
Visibility—
Dew point68°
Thu, 2280° / 69°0.12
80 °
Cayey, Thursday, 22 October
Light rain. High 80°, low 69°.
Pressure29.94 inHg
Wind6.8 mph S
Humidity68%
Visibility—
Dew point66°
Fri, 2382° / 69°0.22
82 °
Cayey, Friday, 23 October
Light rain. High 82°, low 69°.
Pressure29.94 inHg
Wind5.4 mph SE
Humidity60%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2481° / 71°0.13
81 °
Cayey, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.13 in
Chance of precipitation75%
Record high85° (2024)
Record low67° (2017)
Sun, 2581° / 71°0.15
81 °
Cayey, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.15 in
Chance of precipitation73%
Record high85° (2006)
Record low66° (2018)
Mon, 2681° / 71°0.19
81 °
Cayey, Monday, 26 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.19 in
Chance of precipitation75%
Record high85° (2024)
Record low67° (2021)
Tue, 2781° / 71°0.2
81 °
Cayey, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.2 in
Chance of precipitation67%
Record high84° (2024)
Record low66° (2021)
Wed, 2881° / 71°0.17
81 °
Cayey, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.17 in
Chance of precipitation67%
Record high85° (2024)
Record low68° (1970)
Thu, 2981° / 71°0.15
81 °
Cayey, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.15 in
Chance of precipitation75%
Record high84° (2009)
Record low65° (2021)
Fri, 3081° / 71°0.17
81 °
Cayey, Friday, 30 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.17 in
Chance of precipitation72%
Record high83° (2014)
Record low64° (2018)
Sat, 3181° / 71°0.14
81 °
Cayey, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high81°
Average low71°
Average precipitation0.14 in
Chance of precipitation70%
Record high83° (2012)
Record low66° (2021)
Sun, 0180° / 71°0.17
80 °
Cayey, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high80°
Average low71°
Average precipitation0.17 in
Chance of precipitation63%
Record high84° (1960)
Record low66° (1976)
Mon, 0280° / 71°0.15
80 °
Cayey, Monday, 2 November
Climate normal for this date — 60-year average.
Average high80°
Average low71°
Average precipitation0.15 in
Chance of precipitation72%
Record high84° (1965)
Record low66° (1976)
Tue, 0380° / 71°0.14
80 °
Cayey, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high80°
Average low71°
Average precipitation0.14 in
Chance of precipitation65%
Record high84° (1960)
Record low67° (1974)
Wed, 0480° / 70°0.15
80 °
Cayey, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high80°
Average low70°
Average precipitation0.15 in
Chance of precipitation63%
Record high84° (1960)
Record low64° (2000)
Thu, 0580° / 70°0.17
80 °
Cayey, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high80°
Average low70°
Average precipitation0.17 in
Chance of precipitation72%
Record high85° (1960)
Record low66° (2022)
Fri, 0680° / 71°0.19
80 °
Cayey, Friday, 6 November
Climate normal for this date — 60-year average.
Average high80°
Average low71°
Average precipitation0.19 in
Chance of precipitation63%
Record high83° (1960)
Record low66° (2000)
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 Cayey, 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 Cayey, 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.