As of 21:32 PDT

Weather in Prosser, WA

51°

Prosser, Saturday, 10 October, 21:32

Partly cloudy. Feels like 49°. High 59°, low 44°.

Pressure29.83 inHg

Wind2.4 mph N

Humidity60%

Visibility6.2 mi

Dew point38°

See detailed hourly forecast

Monthly outlook for Prosser, WA: average high 67.3°, average low 47.8°. That is 1.6° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 18 October (75.4°), the coolest 11 October (38°).

67.3°/47.8°

Average high / low

+1.6°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	67.4°	65.8°	+0.9°
20 October – 29 October	67.2°	60.6°	+3.7°
30 October – 8 November	at normal	54.9°	—

October records over 66 years

90.3°6 October 2014All-time high

21.6°30 October 2019All-time low

Sun, 1161° / 38°

61 °

Prosser, Sunday, 11 October

Clear. High 61°, low 38°.

Pressure29.91 inHg

Wind12.8 mph NE

Humidity39%

Visibility6.2 mi

Dew point24°

Mon, 1261° / 44°

61 °

Prosser, Monday, 12 October

Clear. High 61°, low 44°.

Pressure30.06 inHg

Wind3.8 mph N

Humidity36%

Visibility6.2 mi

Dew point26°

Tue, 1364° / 40°

64 °

Prosser, Tuesday, 13 October

Clear. High 64°, low 40°.

Pressure30.18 inHg

Wind2.9 mph SW

Humidity36%

Visibility6.2 mi

Dew point29°

Wed, 1468° / 48°

68 °

Prosser, Wednesday, 14 October

Clear. High 68°, low 48°.

Pressure30.24 inHg

Wind2.4 mph S

Humidity31%

Visibility6.2 mi

Dew point30°

Thu, 1571° / 51°

71 °

Prosser, Thursday, 15 October

Clear. High 71°, low 51°.

Pressure30.36 inHg

Wind3.9 mph NE

Humidity29%

Visibility—

Dew point31°

Fri, 1671° / 52°

71 °

Prosser, Friday, 16 October

Mostly clear. High 71°, low 52°.

Pressure30.21 inHg

Wind4.1 mph NE

Humidity34%

Visibility—

Dew point34°

Sat, 1773° / 53°

73 °

Prosser, Saturday, 17 October

Overcast. High 73°, low 53°.

Pressure30.15 inHg

Wind3.5 mph S

Humidity34%

Visibility—

Dew point35°

Sun, 1875° / 55°

75 °

Prosser, Sunday, 18 October

Partly cloudy. High 75°, low 55°.

Pressure30.09 inHg

Wind6.3 mph S

Humidity43%

Visibility—

Dew point42°

Mon, 1972° / 52°

72 °

Prosser, Monday, 19 October

Overcast. High 72°, low 52°.

Pressure30.09 inHg

Wind18 mph W

Humidity42%

Visibility—

Dew point40°

Tue, 2063° / 47°

63 °

Prosser, Tuesday, 20 October

Overcast. High 63°, low 47°.

Pressure30.21 inHg

Wind11.6 mph W

Humidity45%

Visibility—

Dew point36°

Wed, 2164° / 47°

64 °

Prosser, Wednesday, 21 October

Overcast. High 64°, low 47°.

Pressure30.15 inHg

Wind5.7 mph NE

Humidity38%

Visibility—

Dew point31°

Thu, 2266° / 47°

66 °

Prosser, Thursday, 22 October

Overcast. High 66°, low 47°.

Pressure30.18 inHg

Wind5.4 mph NE

Humidity34%

Visibility—

Dew point30°

Fri, 2368° / 48°

68 °

Prosser, Friday, 23 October

Clear. High 68°, low 48°.

Pressure30.15 inHg

Wind4.8 mph NE

Humidity32%

Visibility—

Dew point29°

Sat, 2470° / 49°

70 °

Prosser, Saturday, 24 October

Clear. High 70°, low 49°.

Pressure30.12 inHg

Wind4.6 mph NW

Humidity30%

Visibility—

Dew point29°

Sun, 2572° / 50°

72 °

Prosser, Sunday, 25 October

Overcast. High 72°, low 50°.

Pressure30.03 inHg

Wind7 mph NW

Humidity31%

Visibility—

Dew point31°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2659° / 43°

0.03

59 °

Prosser, Monday, 26 October

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.03 in

Chance of precipitation23%

Record high74° (1986)

Record low25° (2020)

Tue, 2758° / 40°

0.05

58 °

Prosser, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high58°

Average low40°

Average precipitation0.05 in

Chance of precipitation18%

Record high76° (2003)

Record low30° (2020)

Wed, 2857° / 40°

0.04

57 °

Prosser, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high57°

Average low40°

Average precipitation0.04 in

Chance of precipitation30%

Record high73° (2003)

Record low29° (2023)

Thu, 2957° / 40°

0.05

57 °

Prosser, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high57°

Average low40°

Average precipitation0.05 in

Chance of precipitation25%

Record high74° (1965)

Record low24° (1971)

Fri, 3056° / 39°

0.04

56 °

Prosser, Friday, 30 October

Climate normal for this date — 60-year average.

Average high56°

Average low39°

Average precipitation0.04 in

Chance of precipitation23%

Record high71° (1967)

Record low22° (2019)

Sat, 3156° / 40°

0.05

56 °

Prosser, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.05 in

Chance of precipitation22%

Record high72° (1967)

Record low23° (2006)

Sun, 0155° / 39°

0.05

55 °

Prosser, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.05 in

Chance of precipitation28%

Record high68° (1965)

Record low21° (2002)

Mon, 0255° / 39°

0.03

55 °

Prosser, Monday, 2 November

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.03 in

Chance of precipitation17%

Record high67° (1993)

Record low23° (2002)

Tue, 0356° / 39°

0.02

56 °

Prosser, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°

Average low39°

Average precipitation0.02 in

Chance of precipitation17%

Record high71° (1983)

Record low24° (2002)

Wed, 0456° / 40°

0.06

56 °

Prosser, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.06 in

Chance of precipitation27%

Record high70° (2020)

Record low26° (2003)

Thu, 0555° / 39°

0.04

55 °

Prosser, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.04 in

Chance of precipitation23%

Record high69° (2012)

Record low22° (2003)

Fri, 0654° / 38°

0.05

54 °

Prosser, Friday, 6 November

Climate normal for this date — 60-year average.

Average high54°

Average low38°

Average precipitation0.05 in

Chance of precipitation28%

Record high70° (2006)

Record low23° (2003)

Sat, 0754° / 38°

0.06

54 °

Prosser, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high54°

Average low38°

Average precipitation0.06 in

Chance of precipitation27%

Record high71° (1978)

Record low22° (1973)

Sun, 0852° / 37°

0.04

52 °

Prosser, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.04 in

Chance of precipitation25%

Record high64° (1995)

Record low28° (2003)

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 Prosser, WA 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 Prosser, WA 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.