Monthly outlook for San Juan, TX: average high 78.2°, average low 66.8°. That is 0.6° above the climate normal for November. Precipitation is expected on 7 days (about 0.5 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 27 November (85.9°), the coolest 29 November (57.1°).
78.2°/66.8°
Average high / low
+0.6°
Above normal
7 / 3
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
78.2°
77.9°
+0.2°
24 November – 3 December
78.3°
75.4°
+1.6°
4 December – 13 December
at normal
73.9°
—
November records over 66 years
97.3°4 November 1988All-time high
35.4°28 November 1993All-time low
Climate normals and records are computed from the nearest reference point — McAllen (6 mi).
Sun, 1585° / 68°0.04
85 °
San Juan, Sunday, 15 November
Light rain. High 85°, low 68°.
Pressure29.94 inHg
Wind9.2 mph S
Humidity60%
Visibility6.2 mi
Dew point68°
Mon, 1670° / 58°0.04
70 °
San Juan, Monday, 16 November
Light rain. High 70°, low 58°.
Pressure30.24 inHg
Wind13.5 mph N
Humidity67%
Visibility6.2 mi
Dew point55°
Tue, 1763° / 58°0.04
63 °
San Juan, Tuesday, 17 November
Light rain. High 63°, low 58°.
Pressure30.27 inHg
Wind8.7 mph NW
Humidity74%
Visibility5.0 mi
Dew point51°
Wed, 1877° / 63°0
77 °
San Juan, Wednesday, 18 November
Overcast. High 77°, low 63°.
Pressure30.12 inHg
Wind2.1 mph W
Humidity74%
Visibility6.2 mi
Dew point66°
Thu, 1980° / 69°0.08
80 °
San Juan, Thursday, 19 November
Light rain. High 80°, low 69°.
Pressure30.09 inHg
Wind8.9 mph SE
Humidity71%
Visibility—
Dew point68°
Fri, 2081° / 70°0.02
81 °
San Juan, Friday, 20 November
Light rain. High 81°, low 70°.
Pressure30.06 inHg
Wind12.9 mph SE
Humidity57%
Visibility—
Dew point63°
Sat, 2183° / 71°0.06
83 °
San Juan, Saturday, 21 November
Light rain. High 83°, low 71°.
Pressure30.00 inHg
Wind13.3 mph SE
Humidity57%
Visibility—
Dew point64°
Sun, 2282° / 72°0.02
82 °
San Juan, Sunday, 22 November
Light rain. High 82°, low 72°.
Pressure30.12 inHg
Wind12.5 mph E
Humidity54%
Visibility—
Dew point62°
Mon, 2381° / 70°0.15
81 °
San Juan, Monday, 23 November
Light rain. High 81°, low 70°.
Pressure30.09 inHg
Wind12.9 mph E
Humidity57%
Visibility—
Dew point62°
Tue, 2480° / 70°0.01
80 °
San Juan, Tuesday, 24 November
Light rain. High 80°, low 70°.
Pressure30.00 inHg
Wind10.8 mph SE
Humidity56%
Visibility—
Dew point61°
Wed, 2583° / 71°0.01
83 °
San Juan, Wednesday, 25 November
Light rain. High 83°, low 71°.
Pressure30.00 inHg
Wind12.5 mph SE
Humidity55%
Visibility—
Dew point62°
Thu, 2683° / 71°0
83 °
San Juan, Thursday, 26 November
Clear. High 83°, low 71°.
Pressure29.91 inHg
Wind21 mph SE
Humidity56%
Visibility—
Dew point63°
Fri, 2786° / 73°0
86 °
San Juan, Friday, 27 November
Clear. High 86°, low 73°.
Pressure29.71 inHg
Wind24.5 mph S
Humidity54%
Visibility—
Dew point64°
Sat, 2875° / 66°0.05
75 °
San Juan, Saturday, 28 November
Light rain. High 75°, low 66°.
Pressure30.09 inHg
Wind16.9 mph N
Humidity22%
Visibility—
Dew point32°
Sun, 2963° / 57°0
63 °
San Juan, Sunday, 29 November
Partly cloudy. High 63°, low 57°.
Pressure30.30 inHg
Wind16.1 mph N
Humidity33%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 3074° / 58°0.02
74 °
San Juan, Monday, 30 November
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.02 in
Chance of precipitation15%
Record high91° (2019)
Record low37° (1976)
Tue, 0174° / 57°0.04
74 °
San Juan, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.04 in
Chance of precipitation12%
Record high86° (1982)
Record low40° (1976)
Wed, 0276° / 58°0.07
76 °
San Juan, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.07 in
Chance of precipitation15%
Record high89° (1964)
Record low43° (1985)
Thu, 0375° / 59°0.06
75 °
San Juan, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.06 in
Chance of precipitation15%
Record high92° (1964)
Record low35° (1976)
Fri, 0474° / 58°0.03
74 °
San Juan, Friday, 4 December
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.03 in
Chance of precipitation17%
Record high91° (1977)
Record low39° (1968)
Sat, 0575° / 58°0.03
75 °
San Juan, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.03 in
Chance of precipitation17%
Record high96° (1977)
Record low31° (2009)
Sun, 0674° / 58°0.03
74 °
San Juan, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.03 in
Chance of precipitation17%
Record high87° (1994)
Record low42° (2002)
Mon, 0774° / 58°0.05
74 °
San Juan, Monday, 7 December
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.05 in
Chance of precipitation13%
Record high88° (1996)
Record low38° (2013)
Tue, 0875° / 57°0.04
75 °
San Juan, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high75°
Average low57°
Average precipitation0.04 in
Chance of precipitation20%
Record high87° (2012)
Record low35° (2017)
Wed, 0974° / 58°0.06
74 °
San Juan, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.06 in
Chance of precipitation15%
Record high89° (2008)
Record low37° (1989)
Thu, 1072° / 55°0.03
72 °
San Juan, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.03 in
Chance of precipitation13%
Record high89° (1993)
Record low33° (1978)
Fri, 1172° / 55°0.01
72 °
San Juan, Friday, 11 December
Climate normal for this date — 60-year average.
Average high72°
Average low55°
Average precipitation0.01 in
Chance of precipitation8%
Record high90° (1987)
Record low41° (1966)
Sat, 1273° / 56°0.02
73 °
San Juan, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.02 in
Chance of precipitation12%
Record high86° (2025)
Record low37° (1966)
Sun, 1374° / 57°0.03
74 °
San Juan, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.03 in
Chance of precipitation20%
Record high87° (1984)
Record low34° (1966)
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 Juan, TX 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 Juan, TX 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.