Monthly outlook for Merna, WY: average high 46.7°, average low 30.9°. That is 2.5° above the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 22 October (55°), the coolest 1 November (25.3°).
46.7°/30.9°
Average high / low
+2.5°
Above normal
4 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
44.3°
44°
+0.2°
1 November – 10 November
50.8°
38.5°
+6.8°
11 November – 20 November
at normal
34°
—
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).
Fri, 2347° / 38°0.35
47 °
Merna, Friday, 23 October
Snow. High 47°, low 38°.
Pressure29.80 inHg
Wind7.6 mph S
Humidity56%
Visibility6.2 mi
Dew point26°
Sat, 2442° / 28°0
42 °
Merna, Saturday, 24 October
Light rain. High 42°, low 28°.
Pressure30.24 inHg
Wind6.7 mph SE
Humidity79%
Visibility6.2 mi
Dew point31°
Sun, 2541° / 30°0.05
41 °
Merna, Sunday, 25 October
Snow. High 41°, low 30°.
Pressure30.15 inHg
Wind2.4 mph E
Humidity75%
Visibility6.2 mi
Dew point30°
Mon, 2644° / 30°0
44 °
Merna, Monday, 26 October
Partly cloudy. High 44°, low 30°.
Pressure30.21 inHg
Wind7 mph SE
Humidity67%
Visibility—
Dew point30°
Tue, 2734° / 26°0.4
34 °
Merna, Tuesday, 27 October
Snow. High 34°, low 26°.
Pressure29.97 inHg
Wind9.4 mph W
Humidity87%
Visibility—
Dew point30°
Wed, 2844° / 28°0
44 °
Merna, Wednesday, 28 October
Clear. High 44°, low 28°.
Pressure30.06 inHg
Wind8.8 mph NW
Humidity25%
Visibility—
Dew point8°
Thu, 2946° / 28°0
46 °
Merna, Thursday, 29 October
Overcast. High 46°, low 28°.
Pressure30.09 inHg
Wind9 mph SE
Humidity42%
Visibility—
Dew point18°
Fri, 3048° / 34°0
48 °
Merna, Friday, 30 October
Overcast. High 48°, low 34°.
Pressure29.83 inHg
Wind17.9 mph W
Humidity43%
Visibility—
Dew point24°
Sat, 3141° / 30°0.04
41 °
Merna, Saturday, 31 October
Snow. High 41°, low 30°.
Pressure29.83 inHg
Wind15.9 mph W
Humidity50%
Visibility—
Dew point23°
Sun, 0145° / 25°0
45 °
Merna, Sunday, 1 November
Clear. High 45°, low 25°.
Pressure30.06 inHg
Wind7.2 mph NW
Humidity31%
Visibility—
Dew point10°
Mon, 0250° / 27°0
50 °
Merna, Monday, 2 November
Clear. High 50°, low 27°.
Pressure30.27 inHg
Wind6.9 mph NW
Humidity19%
Visibility—
Dew point3°
Tue, 0354° / 32°0
54 °
Merna, Tuesday, 3 November
Overcast. High 54°, low 32°.
Pressure30.24 inHg
Wind4.5 mph SE
Humidity21%
Visibility—
Dew point8°
Wed, 0452° / 35°0
52 °
Merna, Wednesday, 4 November
Clear. High 52°, low 35°.
Pressure30.03 inHg
Wind10.1 mph W
Humidity49%
Visibility—
Dew point30°
Thu, 0551° / 35°0
51 °
Merna, Thursday, 5 November
Partly cloudy. High 51°, low 35°.
Pressure30.03 inHg
Wind7.3 mph W
Humidity55%
Visibility—
Dew point31°
Fri, 0653° / 34°0
53 °
Merna, Friday, 6 November
Mostly clear. High 53°, low 34°.
Pressure29.97 inHg
Wind7.5 mph SE
Humidity55%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Thu, 1236° / 15°0.06
36 °
Merna, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high36°
Average low15°
Average precipitation0.06 in
Chance of precipitation18%
Record high56° (1999)
Record low-14° (2000)
Fri, 1335° / 16°0.05
35 °
Merna, Friday, 13 November
Climate normal for this date — 60-year average.
Average high35°
Average low16°
Average precipitation0.05 in
Chance of precipitation32%
Record high56° (1999)
Record low-13° (2000)
Sat, 1435° / 14°0.06
35 °
Merna, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high35°
Average low14°
Average precipitation0.06 in
Chance of precipitation27%
Record high56° (1999)
Record low-14° (2000)
Sun, 1535° / 11°0.02
35 °
Merna, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high35°
Average low11°
Average precipitation0.02 in
Chance of precipitation13%
Record high55° (1999)
Record low-17° (1964)
Mon, 1635° / 13°0.03
35 °
Merna, Monday, 16 November
Climate normal for this date — 60-year average.
Average high35°
Average low13°
Average precipitation0.03 in
Chance of precipitation22%
Record high51° (1999)
Record low-15° (1980)
Tue, 1733° / 14°0.06
33 °
Merna, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high33°
Average low14°
Average precipitation0.06 in
Chance of precipitation28%
Record high51° (1999)
Record low-15° (1980)
Wed, 1833° / 13°0.06
33 °
Merna, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high33°
Average low13°
Average precipitation0.06 in
Chance of precipitation28%
Record high51° (2008)
Record low-9° (1984)
Thu, 1932° / 12°0.03
32 °
Merna, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high32°
Average low12°
Average precipitation0.03 in
Chance of precipitation22%
Record high49° (2007)
Record low-11° (1994)
Fri, 2032° / 11°0.04
32 °
Merna, Friday, 20 November
Climate normal for this date — 60-year average.
Average high32°
Average low11°
Average precipitation0.04 in
Chance of precipitation28%
Record high51° (1989)
Record low-19° (2011)
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.