Monthly outlook for Merna, WY: average high 44.6°, average low 28.4°. That is 1.6° below the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 19 October (57.5°), the coolest 24 October (16.7°).
44.6°/28.4°
Average high / low
−1.6°
Below normal
4 / 4
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
47.4°
49°
-0.9°
23 October – 1 November
40°
43.3°
-1.8°
2 November – 11 November
at normal
38.1°
—
October records over 66 years
73.2°1 October 2010All-time high
-13.5°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Halfway (10 mi).
Wed, 1448° / 30°0
48 °
Merna, Wednesday, 14 October
Partly cloudy. High 48°, low 30°.
Pressure30.09 inHg
Wind7.2 mph NW
Humidity61%
Visibility6.2 mi
Dew point28°
Thu, 1551° / 29°0
51 °
Merna, Thursday, 15 October
Clear. High 51°, low 29°.
Pressure30.50 inHg
Wind2.1 mph SE
Humidity50%
Visibility6.2 mi
Dew point24°
Fri, 1652° / 29°0
52 °
Merna, Friday, 16 October
Clear. High 52°, low 29°.
Pressure30.62 inHg
Wind5.2 mph SE
Humidity55%
Visibility6.2 mi
Dew point27°
Sat, 1756° / 33°0
56 °
Merna, Saturday, 17 October
Clear. High 56°, low 33°.
Pressure30.27 inHg
Wind3.2 mph S
Humidity42%
Visibility—
Dew point27°
Sun, 1854° / 32°0
54 °
Merna, Sunday, 18 October
Clear. High 54°, low 32°.
Pressure30.06 inHg
Wind6.4 mph NW
Humidity42%
Visibility—
Dew point26°
Mon, 1958° / 34°0
58 °
Merna, Monday, 19 October
Mostly clear. High 58°, low 34°.
Pressure29.88 inHg
Wind15.3 mph SW
Humidity35%
Visibility—
Dew point23°
Tue, 2045° / 36°0.08
45 °
Merna, Tuesday, 20 October
Snow. High 45°, low 36°.
Pressure29.68 inHg
Wind15.4 mph S
Humidity62%
Visibility—
Dew point32°
Wed, 2139° / 33°0.65
39 °
Merna, Wednesday, 21 October
Snow. High 39°, low 33°.
Pressure29.77 inHg
Wind7 mph S
Humidity71%
Visibility—
Dew point29°
Thu, 2234° / 24°0.04
34 °
Merna, Thursday, 22 October
Light snow. High 34°, low 24°.
Pressure29.88 inHg
Wind17.9 mph NW
Humidity83%
Visibility—
Dew point29°
Fri, 2331° / 19°0.08
31 °
Merna, Friday, 23 October
Light snow. High 31°, low 19°.
Pressure30.21 inHg
Wind18.1 mph W
Humidity84%
Visibility—
Dew point23°
Sat, 2435° / 17°0
35 °
Merna, Saturday, 24 October
Partly cloudy. High 35°, low 17°.
Pressure30.53 inHg
Wind9.6 mph NW
Humidity72%
Visibility—
Dew point22°
Sun, 2544° / 23°0
44 °
Merna, Sunday, 25 October
Clear. High 44°, low 23°.
Pressure30.36 inHg
Wind8.8 mph NW
Humidity68%
Visibility—
Dew point29°
Mon, 2646° / 26°0
46 °
Merna, Monday, 26 October
Clear. High 46°, low 26°.
Pressure30.06 inHg
Wind7 mph W
Humidity61%
Visibility—
Dew point28°
Tue, 2743° / 29°0
43 °
Merna, Tuesday, 27 October
Partly cloudy. High 43°, low 29°.
Pressure29.91 inHg
Wind13.4 mph W
Humidity56%
Visibility—
Dew point26°
Wed, 2840° / 27°0
40 °
Merna, Wednesday, 28 October
Partly cloudy. High 40°, low 27°.
Pressure30.09 inHg
Wind11.8 mph NW
Humidity43%
Visibility—
Dew point16°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2942° / 22°0.04
42 °
Merna, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high42°
Average low22°
Average precipitation0.04 in
Chance of precipitation28%
Record high63° (1962)
Record low-4° (1975)
Fri, 3040° / 20°0.06
40 °
Merna, Friday, 30 October
Climate normal for this date — 60-year average.
Average high40°
Average low20°
Average precipitation0.06 in
Chance of precipitation28%
Record high63° (1962)
Record low-14° (2019)
Sat, 3140° / 21°0.04
40 °
Merna, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high40°
Average low21°
Average precipitation0.04 in
Chance of precipitation30%
Record high57° (1988)
Record low-10° (1972)
Sun, 0140° / 20°0.04
40 °
Merna, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high40°
Average low20°
Average precipitation0.04 in
Chance of precipitation25%
Record high57° (1988)
Record low-13° (2002)
Mon, 0239° / 19°0.06
39 °
Merna, Monday, 2 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.06 in
Chance of precipitation25%
Record high56° (1962)
Record low-15° (1973)
Tue, 0340° / 18°0.03
40 °
Merna, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high40°
Average low18°
Average precipitation0.03 in
Chance of precipitation15%
Record high58° (1962)
Record low-14° (1967)
Wed, 0440° / 18°0.03
40 °
Merna, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high40°
Average low18°
Average precipitation0.03 in
Chance of precipitation17%
Record high55° (2020)
Record low-11° (2002)
Thu, 0539° / 19°0.04
39 °
Merna, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.04 in
Chance of precipitation22%
Record high55° (1980)
Record low-14° (1961)
Fri, 0639° / 19°0.04
39 °
Merna, Friday, 6 November
Climate normal for this date — 60-year average.
Average high39°
Average low19°
Average precipitation0.04 in
Chance of precipitation27%
Record high54° (1999)
Record low-14° (2003)
Sat, 0739° / 18°0.06
39 °
Merna, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high39°
Average low18°
Average precipitation0.06 in
Chance of precipitation30%
Record high54° (1999)
Record low-20° (2003)
Sun, 0837° / 18°0.07
37 °
Merna, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high37°
Average low18°
Average precipitation0.07 in
Chance of precipitation40%
Record high54° (1999)
Record low-3° (2003)
Mon, 0937° / 17°0.05
37 °
Merna, Monday, 9 November
Climate normal for this date — 60-year average.
Average high37°
Average low17°
Average precipitation0.05 in
Chance of precipitation32%
Record high56° (2016)
Record low-9° (1960)
Tue, 1036° / 15°0.04
36 °
Merna, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high36°
Average low15°
Average precipitation0.04 in
Chance of precipitation33%
Record high53° (2016)
Record low-12° (1985)
Wed, 1135° / 15°0.04
35 °
Merna, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high35°
Average low15°
Average precipitation0.04 in
Chance of precipitation30%
Record high52° (1999)
Record low-13° (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 Merna, WY 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 Merna, WY 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.