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Phoenix, AZ vs Rock Falls, IL weather comparison

Phoenix

AZ

Rock Falls picks up around 29 more inches of snow each winter.

Phoenix has around 136 fewer freezing nights a year. Phoenix endures about 150 more days above 90 °F each year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Phoenix, AZ and Rock Falls, IL
PhoenixMetricRock Falls
307 daysSunny daysclear or partly cloudy skies188 days
7 inPrecipitationper year38 in
33 daysWet daysrain or snow per year121 days
0 inSnowfallper year29 in
163 daysHot daysabove 90 °F13 days
2 daysFreezing nightsat or below 32 °F137 days
35%Humidityaverage relative71%
74 °FAverage temperatureyear round49 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

PhoenixRock Falls

Daily highs

255075100JanMarMayJulSepNovPhoenix, Jan: 66 °FPhoenix, Feb: 69 °FPhoenix, Mar: 76 °FPhoenix, Apr: 83 °FPhoenix, May: 92 °FPhoenix, Jun: 102 °FPhoenix, Jul: 105 °FPhoenix, Aug: 103 °FPhoenix, Sep: 98 °FPhoenix, Oct: 87 °FPhoenix, Nov: 75 °FPhoenix, Dec: 65 °FRock Falls, Jan: 29 °FRock Falls, Feb: 34 °FRock Falls, Mar: 46 °FRock Falls, Apr: 60 °FRock Falls, May: 71 °FRock Falls, Jun: 80 °FRock Falls, Jul: 83 °FRock Falls, Aug: 81 °FRock Falls, Sep: 75 °FRock Falls, Oct: 63 °FRock Falls, Nov: 47 °FRock Falls, Dec: 35 °F

Daily lows

255075JanMarMayJulSepNovPhoenix, Jan: 44 °FPhoenix, Feb: 47 °FPhoenix, Mar: 52 °FPhoenix, Apr: 58 °FPhoenix, May: 67 °FPhoenix, Jun: 75 °FPhoenix, Jul: 82 °FPhoenix, Aug: 82 °FPhoenix, Sep: 76 °FPhoenix, Oct: 64 °FPhoenix, Nov: 51 °FPhoenix, Dec: 43 °FRock Falls, Jan: 13 °FRock Falls, Feb: 17 °FRock Falls, Mar: 28 °FRock Falls, Apr: 38 °FRock Falls, May: 50 °FRock Falls, Jun: 60 °FRock Falls, Jul: 64 °FRock Falls, Aug: 61 °FRock Falls, Sep: 53 °FRock Falls, Oct: 41 °FRock Falls, Nov: 30 °FRock Falls, Dec: 19 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix high666976839210210510398877565
Rock Falls high293446607180838175634735
Phoenix low444752586775828276645143
Rock Falls low131728385060646153413019

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

PhoenixRock Falls
0.02.04.0JanMarMayJulSepNovPhoenix, Jan: 0.9 inPhoenix, Feb: 1.1 inPhoenix, Mar: 0.8 inPhoenix, Apr: 0.2 inPhoenix, May: 0.1 inPhoenix, Jun: 0.1 inPhoenix, Jul: 0.6 inPhoenix, Aug: 0.9 inPhoenix, Sep: 0.7 inPhoenix, Oct: 0.6 inPhoenix, Nov: 0.5 inPhoenix, Dec: 0.8 inRock Falls, Jan: 1.9 inRock Falls, Feb: 1.9 inRock Falls, Mar: 2.6 inRock Falls, Apr: 4.3 inRock Falls, May: 4.7 inRock Falls, Jun: 4.5 inRock Falls, Jul: 3.7 inRock Falls, Aug: 3.3 inRock Falls, Sep: 3.4 inRock Falls, Oct: 2.9 inRock Falls, Nov: 2.5 inRock Falls, Dec: 2.2 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix0.91.10.80.20.10.10.60.90.70.60.50.8
Rock Falls1.91.92.64.34.74.53.73.33.42.92.52.2

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

PhoenixRock Falls
0102030JanMarMayJulSepNovPhoenix, Jan: 23 daysPhoenix, Feb: 21 daysPhoenix, Mar: 25 daysPhoenix, Apr: 27 daysPhoenix, May: 29 daysPhoenix, Jun: 29 daysPhoenix, Jul: 24 daysPhoenix, Aug: 26 daysPhoenix, Sep: 28 daysPhoenix, Oct: 28 daysPhoenix, Nov: 25 daysPhoenix, Dec: 24 daysRock Falls, Jan: 13 daysRock Falls, Feb: 12 daysRock Falls, Mar: 14 daysRock Falls, Apr: 13 daysRock Falls, May: 15 daysRock Falls, Jun: 16 daysRock Falls, Jul: 20 daysRock Falls, Aug: 21 daysRock Falls, Sep: 20 daysRock Falls, Oct: 17 daysRock Falls, Nov: 15 daysRock Falls, Dec: 13 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Phoenix232125272929242628282524
Rock Falls131214131516202120171513

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

Phoenix vs another city

See the full Phoenix, AZ climate profile

More Arizona cities

Rock Falls vs another city

See the full Rock Falls, IL climate profile

More Illinois cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).