When to plant in Marianne, PA
Planting dates worked out from Marianne's own frost records, not a generic zone chart.
Safe to plant out
May 26
1 year in 10 has a later frost
Average last frost
May 10
about a 50% chance of a later one
Average first fall frost
Oct 9
1 year in 10 by Oct 1
Frost-free days
151
median, 1991–2020
Station used: Clarion 3 Sw · 6.1 km away · station 317 m, town 442 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 31 – Apr 14 | May 26 – Jun 9 | Jul 20 |
| Sweet pepper | Mar 17 – Mar 31 | May 26 – Jun 9 | Jul 25 |
| Lettuce (leaf) | Mar 8 – Mar 15 | Apr 12 – Apr 26 | May 22 |
| Peas | — | Apr 5 – May 3 | May 30 |
| Bush beans | — | May 19 – Jun 9 | Jul 8 |
| Carrot | — | Apr 19 – May 31 | Jun 18 |
| Beet | — | Apr 15 – May 27 | Jun 4 |
| Potato | — | Apr 19 – May 10 | Jun 28 |
| Kale | Mar 1 – Mar 15 | Apr 12 – Apr 26 | May 25 |
| Broccoli | Mar 1 – Mar 15 | Apr 12 – May 3 | Jun 11 |
| Cucumber | Apr 28 – May 5 | May 26 – Jun 9 | Jul 15 |
| Summer squash and zucchini | Apr 28 – May 5 | May 26 – Jun 9 | Jul 10 |
| Winter squash | Apr 28 – May 5 | May 26 – Jun 9 | Aug 14 |
| Sweet corn | — | May 19 – Jun 9 | Jul 18 |
| Onion (from sets) | — | Apr 12 – May 3 | Jul 11 |
| Garlic | — | Sep 25 – Oct 23 (fall) | following summer |
| Spinach | — | Apr 5 – May 3 | May 13 |
| Basil | Apr 14 – Apr 28 | May 26 – Jun 9 | Jul 22 |
Marianne's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 1944 | Apr 30 |
| 1945 | Jun 6 |
| 1946 | May 13 |
| 1947 | May 12 |
| 1948 | May 26 |
| 1949 | Jun 8 |
| 1950 | Jun 18 |
| 1951 | May 14 |
| 1952 | May 30 |
| 1953 | May 29 |
| 1954 | May 26 |
| 1955 | May 21 |
| 1956 | May 26 |
| 1957 | May 17 |
| 1958 | Jun 7 |
| 1959 | May 16 |
| 1960 | May 4 |
| 1961 | May 31 |
| 1962 | May 10 |
| 1963 | May 24 |
| 1964 | May 30 |
| 1966 | Jun 2 |
| 1967 | May 27 |
| 1968 | May 7 |
| 1969 | May 15 |
| 1970 | May 18 |
| 1971 | May 28 |
| 1972 | Jun 11 |
| 1974 | May 8 |
| 1975 | Apr 28 |
| 1976 | May 20 |
| 1977 | Jun 8 |
| 1978 | Jun 14 |
| 1979 | May 5 |
| 1980 | May 9 |
| 1981 | May 20 |
| 1982 | May 10 |
| 1983 | Jun 2 |
| 1984 | Jun 2 |
| 1985 | May 19 |
| 1986 | May 4 |
| 1987 | May 16 |
| 1988 | May 2 |
| 1989 | May 28 |
| 1991 | Apr 23 |
| 1992 | May 27 |
| 1993 | Apr 28 |
| 1995 | May 9 |
| 1996 | May 15 |
| 1997 | May 24 |
| 1998 | Apr 29 |
| 1999 | Apr 28 |
| 2000 | Apr 30 |
| 2001 | May 31 |
| 2002 | May 24 |
| 2003 | Apr 28 |
| 2004 | May 7 |
| 2005 | May 18 |
| 2009 | May 20 |
| 2010 | May 11 |
| 2011 | May 6 |
| 2012 | Apr 30 |
| 2013 | May 26 |
| 2014 | May 6 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1944 | 167 |
| 1945 | 119 |
| 1946 | 152 |
| 1947 | 133 |
| 1948 | 130 |
| 1949 | 108 |
| 1950 | 97 |
| 1951 | 137 |
| 1952 | 117 |
| 1953 | 107 |
| 1954 | 120 |
| 1955 | 134 |
| 1956 | 117 |
| 1957 | 132 |
| 1958 | 116 |
| 1959 | 123 |
| 1960 | 149 |
| 1962 | 132 |
| 1963 | 120 |
| 1964 | 105 |
| 1966 | 105 |
| 1967 | 120 |
| 1968 | 150 |
| 1969 | 136 |
| 1970 | 151 |
| 1971 | 159 |
| 1972 | 90 |
| 1974 | 138 |
| 1975 | 157 |
| 1976 | 143 |
| 1977 | 127 |
| 1978 | 124 |
| 1979 | 160 |
| 1980 | 157 |
| 1981 | 126 |
| 1982 | 109 |
| 1983 | 111 |
| 1984 | 109 |
| 1985 | 140 |
| 1986 | 126 |
| 1987 | 132 |
| 1988 | 164 |
| 1989 | 118 |
| 1991 | 167 |
| 1992 | 126 |
| 1993 | 155 |
| 1995 | 160 |
| 1996 | 141 |
| 1997 | 130 |
| 1998 | 148 |
| 1999 | 147 |
| 2000 | 160 |
| 2001 | 129 |
| 2002 | 143 |
| 2003 | 157 |
| 2004 | 151 |
| 2005 | 163 |
| 2009 | 146 |
| 2010 | 154 |
| 2011 | 169 |
| 2012 | 161 |
| 2013 | 151 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1944 | 17.5 °C |
| 1945 | 17.1 °C |
| 1946 | 16.0 °C |
| 1947 | 16.6 °C |
| 1948 | 16.6 °C |
| 1949 | 16.6 °C |
| 1950 | 14.8 °C |
| 1951 | 15.6 °C |
| 1952 | 16.0 °C |
| 1953 | 16.0 °C |
| 1954 | 15.8 °C |
| 1955 | 17.0 °C |
| 1956 | 15.9 °C |
| 1957 | 16.9 °C |
| 1958 | 15.7 °C |
| 1959 | 17.5 °C |
| 1960 | 16.4 °C |
| 1962 | 14.4 °C |
| 1963 | 15.6 °C |
| 1964 | 16.2 °C |
| 1966 | 15.4 °C |
| 1967 | 15.5 °C |
| 1968 | 16.8 °C |
| 1969 | 16.2 °C |
| 1970 | 17.3 °C |
| 1971 | 15.8 °C |
| 1972 | 15.2 °C |
| 1974 | 16.6 °C |
| 1975 | 16.8 °C |
| 1976 | 16.4 °C |
| 1977 | 17.6 °C |
| 1978 | 16.7 °C |
| 1979 | 16.5 °C |
| 1980 | 17.5 °C |
| 1981 | 17.1 °C |
| 1982 | 15.8 °C |
| 1983 | 16.1 °C |
| 1984 | 15.5 °C |
| 1985 | 16.9 °C |
| 1987 | 17.5 °C |
| 1991 | 19.6 °C |
| 1995 | 16.5 °C |
| 1996 | 15.5 °C |
| 1997 | 14.6 °C |
| 1998 | 17.1 °C |
| 1999 | 17.1 °C |
| 2000 | 15.9 °C |
| 2001 | 16.3 °C |
| 2002 | 16.6 °C |
| 2003 | 16.1 °C |
| 2004 | 16.5 °C |
| 2005 | 17.3 °C |
| 2008 | 15.9 °C |
| 2009 | 15.5 °C |
| 2010 | 17.0 °C |
| 2011 | 16.8 °C |
| 2012 | 16.6 °C |
| 2013 | 16.0 °C |
What this means for you: Since 1944, Marianne's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 5 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Clarion 3 Sw (NOAA GHCN-Daily). Years with too many missing days are left out.