Monthly outlook for Mayday, TN: average high 72°, average low 49.6°. That is 3.6° above the climate normal for October. Precipitation is expected on 2 days (about 1.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 15 October (81.3°), the coolest 18 October (29.2°).
72°/49.6°
Average high / low
+3.6°
Above normal
2 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
70.8°
66.5°
+2.4°
21 October – 30 October
74°
63.4°
+5.9°
31 October – 9 November
at normal
60.2°
—
October records over 66 years
91.4°3 October 2019All-time high
22.5°27 October 1982All-time low
Climate normals and records are computed from the nearest reference point — Johnson City (11 mi).
Mon, 1275° / 60°0.01
75 °
Mayday, Monday, 12 October
Light rain. High 75°, low 60°.
Pressure30.15 inHg
Wind10.8 mph W
Humidity77%
Visibility6.2 mi
Dew point60°
Tue, 1378° / 57°0
78 °
Mayday, Tuesday, 13 October
Clear. High 78°, low 57°.
Pressure30.09 inHg
Wind7 mph SW
Humidity68%
Visibility6.2 mi
Dew point63°
Wed, 1479° / 61°0
79 °
Mayday, Wednesday, 14 October
Clear. High 79°, low 61°.
Pressure30.09 inHg
Wind4.7 mph W
Humidity67%
Visibility6.2 mi
Dew point65°
Thu, 1581° / 60°0
81 °
Mayday, Thursday, 15 October
Mostly clear. High 81°, low 60°.
Pressure30.12 inHg
Wind1.5 mph SW
Humidity76%
Visibility6.2 mi
Dew point68°
Fri, 1678° / 55°0.04
78 °
Mayday, Friday, 16 October
Light rain. High 78°, low 55°.
Pressure30.03 inHg
Wind16.7 mph W
Humidity61%
Visibility—
Dew point62°
Sat, 1751° / 31°0
51 °
Mayday, Saturday, 17 October
Clear. High 51°, low 31°.
Pressure30.42 inHg
Wind14.6 mph N
Humidity26%
Visibility—
Dew point16°
Sun, 1862° / 29°0
62 °
Mayday, Sunday, 18 October
Clear. High 62°, low 29°.
Pressure30.50 inHg
Wind5.2 mph SE
Humidity16%
Visibility—
Dew point11°
Mon, 1966° / 36°0
66 °
Mayday, Monday, 19 October
Clear. High 66°, low 36°.
Pressure30.53 inHg
Wind4.6 mph SE
Humidity21%
Visibility—
Dew point21°
Tue, 2070° / 43°0
70 °
Mayday, Tuesday, 20 October
Clear. High 70°, low 43°.
Pressure30.36 inHg
Wind5 mph SE
Humidity29%
Visibility—
Dew point33°
Wed, 2171° / 45°0
71 °
Mayday, Wednesday, 21 October
Overcast. High 71°, low 45°.
Pressure30.33 inHg
Wind7.4 mph SE
Humidity29%
Visibility—
Dew point34°
Thu, 2272° / 44°0
72 °
Mayday, Thursday, 22 October
Clear. High 72°, low 44°.
Pressure30.39 inHg
Wind5.5 mph SE
Humidity30%
Visibility—
Dew point35°
Fri, 2374° / 49°0
74 °
Mayday, Friday, 23 October
Clear. High 74°, low 49°.
Pressure30.24 inHg
Wind5.5 mph SE
Humidity44%
Visibility—
Dew point48°
Sat, 2477° / 52°0
77 °
Mayday, Saturday, 24 October
Partly cloudy. High 77°, low 52°.
Pressure30.06 inHg
Wind4.5 mph SE
Humidity48%
Visibility—
Dew point53°
Sun, 2575° / 55°0
75 °
Mayday, Sunday, 25 October
Overcast. High 75°, low 55°.
Pressure29.91 inHg
Wind8.6 mph NW
Humidity46%
Visibility—
Dew point50°
Mon, 2674° / 54°0
74 °
Mayday, Monday, 26 October
Clear. High 74°, low 54°.
Pressure29.83 inHg
Wind10.2 mph W
Humidity48%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2762° / 45°0.15
62 °
Mayday, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high62°
Average low45°
Average precipitation0.15 in
Chance of precipitation40%
Record high77° (1984)
Record low22° (1982)
Wed, 2862° / 46°0.13
62 °
Mayday, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high62°
Average low46°
Average precipitation0.13 in
Chance of precipitation40%
Record high78° (1991)
Record low26° (1976)
Thu, 2962° / 44°0.12
62 °
Mayday, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high62°
Average low44°
Average precipitation0.12 in
Chance of precipitation30%
Record high78° (2023)
Record low29° (1976)
Fri, 3063° / 43°0.13
63 °
Mayday, Friday, 30 October
Climate normal for this date — 60-year average.
Average high63°
Average low43°
Average precipitation0.13 in
Chance of precipitation28%
Record high77° (2024)
Record low28° (2017)
Sat, 3164° / 45°0.08
64 °
Mayday, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.08 in
Chance of precipitation30%
Record high78° (2024)
Record low32° (1993)
Sun, 0163° / 45°0.09
63 °
Mayday, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.09 in
Chance of precipitation35%
Record high78° (2016)
Record low28° (2023)
Mon, 0262° / 44°0.15
62 °
Mayday, Monday, 2 November
Climate normal for this date — 60-year average.
Average high62°
Average low44°
Average precipitation0.15 in
Chance of precipitation35%
Record high78° (2004)
Record low24° (2023)
Tue, 0361° / 43°0.08
61 °
Mayday, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high61°
Average low43°
Average precipitation0.08 in
Chance of precipitation27%
Record high77° (2003)
Record low24° (2014)
Wed, 0459° / 42°0.14
59 °
Mayday, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high59°
Average low42°
Average precipitation0.14 in
Chance of precipitation37%
Record high77° (2003)
Record low25° (1966)
Thu, 0559° / 41°0.13
59 °
Mayday, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high59°
Average low41°
Average precipitation0.13 in
Chance of precipitation32%
Record high75° (2022)
Record low25° (1991)
Fri, 0659° / 41°0.06
59 °
Mayday, Friday, 6 November
Climate normal for this date — 60-year average.
Average high59°
Average low41°
Average precipitation0.06 in
Chance of precipitation33%
Record high79° (2024)
Record low25° (1967)
Sat, 0759° / 41°0.14
59 °
Mayday, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high59°
Average low41°
Average precipitation0.14 in
Chance of precipitation32%
Record high77° (2024)
Record low26° (1967)
Sun, 0858° / 40°0.1
58 °
Mayday, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high58°
Average low40°
Average precipitation0.1 in
Chance of precipitation28%
Record high78° (2023)
Record low25° (1971)
Mon, 0959° / 40°0.09
59 °
Mayday, Monday, 9 November
Climate normal for this date — 60-year average.
Average high59°
Average low40°
Average precipitation0.09 in
Chance of precipitation25%
Record high76° (2023)
Record low25° (1995)
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 Mayday, TN 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 Mayday, TN 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.