Monthly outlook for Merna, WY: average high 49°, average low 31.8°. That is 2.7° above the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 20 October (59°), the coolest 19 October (26.5°).
49°/31.8°
Average high / low
+2.7°
Above normal
3 / 4
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
51.2°
46.4°
+2.6°
29 October – 7 November
45.3°
39.7°
+3.1°
8 November – 17 November
at normal
35.3°
—
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).
Tue, 2059° / 27°0.02
59 °
Merna, Tuesday, 20 October
Light rain. High 59°, low 27°.
Pressure30.09 inHg
Wind4.3 mph SE
Humidity43%
Visibility6.2 mi
Dew point31°
Wed, 2155° / 33°0.01
55 °
Merna, Wednesday, 21 October
Light rain. High 55°, low 33°.
Pressure30.15 inHg
Wind6.6 mph SE
Humidity59%
Visibility6.2 mi
Dew point37°
Thu, 2252° / 36°0.05
52 °
Merna, Thursday, 22 October
Light rain. High 52°, low 36°.
Pressure30.09 inHg
Wind7 mph SE
Humidity77%
Visibility6.2 mi
Dew point40°
Fri, 2342° / 32°0.77
42 °
Merna, Friday, 23 October
Snow. High 42°, low 32°.
Pressure29.80 inHg
Wind8.3 mph SW
Humidity81%
Visibility3.3 mi
Dew point34°
Sat, 2442° / 30°0.01
42 °
Merna, Saturday, 24 October
Light snow. High 42°, low 30°.
Pressure30.18 inHg
Wind6 mph NW
Humidity67%
Visibility—
Dew point29°
Sun, 2553° / 30°0
53 °
Merna, Sunday, 25 October
Clear. High 53°, low 30°.
Pressure30.30 inHg
Wind7.9 mph NW
Humidity22%
Visibility—
Dew point9°
Mon, 2653° / 33°0
53 °
Merna, Monday, 26 October
Mostly clear. High 53°, low 33°.
Pressure30.03 inHg
Wind12.5 mph NW
Humidity21%
Visibility—
Dew point10°
Tue, 2748° / 32°0
48 °
Merna, Tuesday, 27 October
Clear. High 48°, low 32°.
Pressure30.21 inHg
Wind7.9 mph SE
Humidity37%
Visibility—
Dew point19°
Wed, 2850° / 28°0
50 °
Merna, Wednesday, 28 October
Overcast. High 50°, low 28°.
Pressure30.15 inHg
Wind4.1 mph SE
Humidity30%
Visibility—
Dew point14°
Thu, 2953° / 32°0
53 °
Merna, Thursday, 29 October
Overcast. High 53°, low 32°.
Pressure29.94 inHg
Wind10 mph NW
Humidity31%
Visibility—
Dew point17°
Fri, 3049° / 36°0
49 °
Merna, Friday, 30 October
Overcast. High 49°, low 36°.
Pressure29.77 inHg
Wind12.3 mph NW
Humidity39%
Visibility—
Dew point21°
Sat, 3146° / 33°0
46 °
Merna, Saturday, 31 October
Light rain. High 46°, low 33°.
Pressure29.91 inHg
Wind13.4 mph W
Humidity62%
Visibility—
Dew point30°
Sun, 0149° / 31°0
49 °
Merna, Sunday, 1 November
Partly cloudy. High 49°, low 31°.
Pressure30.09 inHg
Wind9.4 mph SE
Humidity51%
Visibility—
Dew point25°
Mon, 0237° / 35°0.61
37 °
Merna, Monday, 2 November
Snow. High 37°, low 35°.
Pressure30.00 inHg
Wind6.8 mph NW
Humidity99%
Visibility—
Dew point36°
Tue, 0339° / 34°0.02
39 °
Merna, Tuesday, 3 November
Snow. High 39°, low 34°.
Pressure30.09 inHg
Wind6 mph NW
Humidity83%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)
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.