The following table presents the monthly inflation rate, i.e. the rate of increase (or decrease) in the basket of goods and services tracked by the U.S. Bureau of Labor Statistics over the last month.

Typically we look at the change in prices (price inflation) on a yearly or annual basis, i.e. how much prices have changed since last year. 

This table presents the data on a monthly basis (i.e. how much prices have changed since last month).

Since inflation compounds,  the annual inflation rate is not just a combination of the monthly inflation rates.
See: annual inflation rates for what is normally considered "the  Inflation Rate".  

This data is based on the historical CPI-U data from the Bureau of Labor Statistics.

For historical annual inflation rates , historical Consumer Price Indexes

Monthly Inflation Rate Table

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1913	NA	0.00%	0.00%	0.00%	(1.02%)	1.03%	1.02%	0.00%	1.01%	0.00%	1.00%	(0.99%)
1914	0.00%	(1.00%)	0.00%	(1.01%)	1.02%	0.00%	1.01%	2.00%	0.00%	(0.98%)	0.99%	(0.98%)
1915	0.00%	(0.99%)	(1.00%)	1.01%	1.00%	0.00%	0.00%	0.00%	0.00%	0.99%	0.98%	0.00%
1916	0.97%	0.00%	0.96%	0.95%	0.94%	0.93%	0.00%	0.93%	1.83%	1.80%	1.77%	0.87%
1917	0.86%	2.56%	0.00%	5.00%	1.59%	1.56%	(1.54%)	1.56%	2.31%	1.50%	0.00%	1.48%
1918	2.19%	0.71%	(0.71%)	1.43%	2.11%	1.38%	2.72%	1.99%	1.95%	1.91%	1.88%	1.23%
1919	0.00%	(1.82%)	1.23%	1.83%	1.20%	0.00%	2.96%	1.72%	0.56%	1.69%	2.21%	2.16%
1920	2.12%	1.04%	1.03%	3.05%	1.48%	1.46%	(0.48%)	(2.40%)	(1.48%)	(0.50%)	(0.50%)	(2.02%)
1921	(2.06%)	(3.16%)	(0.54%)	(1.09%)	(2.21%)	(0.56%)	0.57%	0.00%	(1.13%)	0.00%	(0.57%)	(0.57%)
1922	(2.31%)	0.00%	(1.18%)	0.00%	0.00%	0.00%	0.60%	(1.19%)	0.00%	0.60%	0.60%	0.60%
1923	(0.59%)	0.00%	0.00%	0.60%	0.00%	0.59%	1.18%	(0.58%)	0.58%	0.58%	0.00%	0.00%
1924	0.00%	(0.58%)	(0.58%)	(0.58%)	0.00%	0.00%	0.59%	(0.58%)	0.59%	0.58%	0.00%	0.58%
1925	0.00%	(0.58%)	0.58%	(0.58%)	0.58%	1.16%	1.14%	0.00%	0.00%	0.00%	1.69%	(0.56%)
1926	0.00%	0.00%	(0.56%)	0.56%	(0.56%)	(0.56%)	(1.13%)	(0.57%)	0.57%	0.57%	0.57%	0.00%
1927	(1.13%)	(0.57%)	(0.57%)	0.00%	0.58%	1.15%	(1.70%)	(0.58%)	0.58%	0.58%	(0.57%)	0.00%
1928	0.00%	(1.16%)	0.00%	0.00%	0.58%	(0.58%)	0.00%	0.00%	1.17%	(0.58%)	0.00%	(0.58%)
1929	0.00%	0.00%	(0.58%)	(0.59%)	0.59%	0.59%	1.17%	0.00%	0.00%	0.00%	0.00%	(0.58%)
1930	(0.58%)	(0.58%)	(0.59%)	0.59%	(0.59%)	(0.59%)	(1.19%)	(0.60%)	0.61%	(0.60%)	(0.61%)	(1.83%)
1931	(1.24%)	(1.26%)	(0.64%)	(0.64%)	(1.29%)	(1.31%)	0.00%	0.00%	(0.66%)	(0.67%)	(1.34%)	(0.68%)
1932	(2.05%)	(1.40%)	(0.71%)	(0.71%)	(1.44%)	(0.73%)	0.00%	(0.74%)	(0.74%)	(0.75%)	(0.75%)	(0.76%)
1933	(1.53%)	(1.55%)	(0.79%)	0.00%	0.00%	0.79%	3.15%	0.76%	0.00%	0.00%	0.00%	0.00%
1934	0.00%	0.76%	0.00%	0.00%	0.00%	0.75%	0.00%	0.00%	1.49%	(0.74%)	0.00%	(0.74%)
1935	1.49%	0.74%	0.00%	0.73%	0.00%	(0.72%)	0.00%	0.00%	0.00%	0.00%	0.73%	0.00%
1936	0.00%	0.00%	(0.72%)	0.00%	0.00%	0.73%	0.72%	0.72%	0.00%	0.00%	0.00%	0.00%
1937	0.71%	0.00%	0.71%	0.70%	0.70%	0.00%	0.69%	0.00%	0.69%	0.00%	(0.68%)	(0.69%)
1938	(1.39%)	(0.70%)	0.00%	0.71%	(0.70%)	0.00%	0.00%	0.00%	0.00%	(0.71%)	0.00%	0.00%
1939	0.00%	(0.71%)	0.00%	(0.72%)	0.00%	0.00%	0.00%	0.00%	2.17%	(0.71%)	0.00%	0.00%
1940	(0.71%)	0.72%	0.00%	0.00%	0.00%	0.71%	(0.71%)	0.00%	0.00%	0.00%	0.00%	0.71%
1941	0.00%	0.00%	0.71%	0.70%	0.70%	2.08%	0.00%	1.36%	1.34%	1.32%	0.65%	0.65%
1942	1.29%	0.64%	1.27%	0.63%	1.24%	0.00%	0.61%	0.61%	0.00%	1.21%	0.60%	0.60%
1943	0.00%	0.00%	1.78%	1.16%	0.57%	0.00%	(0.57%)	(0.57%)	0.58%	0.00%	0.00%	0.00%
1944	0.00%	0.00%	0.00%	0.57%	0.00%	0.57%	0.57%	0.00%	0.00%	0.00%	0.00%	0.56%
1945	0.00%	0.00%	0.00%	0.00%	0.56%	1.12%	0.00%	0.00%	0.00%	0.00%	0.00%	0.55%
1946	0.00%	(0.55%)	1.10%	0.55%	0.54%	1.08%	5.88%	2.02%	0.99%	1.96%	2.40%	0.94%
1947	0.00%	0.00%	1.86%	0.00%	0.00%	0.46%	0.91%	1.35%	2.22%	0.00%	0.43%	1.30%
1948	1.28%	(0.84%)	(0.43%)	1.71%	0.42%	0.84%	1.24%	0.41%	0.00%	(0.41%)	(0.82%)	(0.41%)
1949	(0.41%)	(0.83%)	0.00%	0.42%	(0.42%)	0.42%	(0.84%)	0.42%	0.42%	(0.84%)	0.42%	(0.84%)
1950	(0.42%)	0.00%	0.43%	0.00%	0.42%	0.42%	1.26%	0.83%	0.41%	0.82%	0.41%	1.21%
1951	1.60%	1.18%	0.39%	0.00%	0.39%	0.00%	0.00%	0.00%	0.77%	0.38%	0.76%	0.38%
1952	0.00%	(0.75%)	0.00%	0.38%	0.00%	0.38%	0.75%	0.00%	0.00%	0.00%	0.00%	0.00%
1953	(0.37%)	(0.38%)	0.38%	0.00%	0.38%	0.37%	0.00%	0.37%	0.00%	0.37%	(0.37%)	0.00%
1954	0.00%	0.00%	0.00%	(0.37%)	0.37%	0.00%	0.00%	0.00%	(0.37%)	0.00%	0.00%	(0.37%)
1955	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.37%	0.00%	0.37%	0.00%	0.00%	(0.37%)
1956	0.00%	0.00%	0.00%	0.37%	0.37%	0.74%	0.74%	(0.36%)	0.37%	0.36%	0.00%	0.36%
1957	0.00%	0.36%	0.36%	0.36%	0.36%	0.36%	0.71%	0.00%	0.00%	0.00%	0.35%	0.00%
1958	0.70%	0.00%	0.70%	0.35%	0.00%	0.00%	0.35%	(0.34%)	0.00%	0.00%	0.35%	(0.34%)
1959	0.35%	(0.34%)	0.00%	0.35%	0.00%	0.34%	0.34%	0.00%	0.34%	0.34%	0.00%	0.00%
1960	(0.34%)	0.34%	0.00%	0.34%	0.00%	0.34%	0.00%	0.00%	0.00%	0.68%	0.00%	0.00%
1961	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.67%	(0.33%)	0.33%	0.00%	0.00%	0.00%
1962	0.00%	0.33%	0.00%	0.33%	0.00%	0.00%	0.33%	0.00%	0.33%	0.00%	0.00%	0.00%
1963	0.00%	0.00%	0.33%	0.00%	0.00%	0.33%	0.33%	0.00%	0.00%	0.33%	0.00%	0.32%
1964	0.00%	0.00%	0.00%	0.00%	0.00%	0.32%	0.32%	(0.32%)	0.32%	0.00%	0.32%	0.00%
1965	0.00%	0.00%	0.32%	0.32%	0.00%	0.64%	0.00%	0.00%	0.00%	0.32%	0.00%	0.32%
1966	0.00%	0.63%	0.31%	0.62%	0.00%	0.31%	0.31%	0.62%	0.00%	0.61%	0.00%	0.00%
1967	0.00%	0.00%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%
1968	0.59%	0.29%	0.29%	0.29%	0.29%	0.58%	0.58%	0.29%	0.29%	0.57%	0.28%	0.28%
1969	0.28%	0.56%	0.84%	0.55%	0.28%	0.55%	0.55%	0.54%	0.27%	0.54%	0.54%	0.53%
1970	0.27%	0.53%	0.53%	0.79%	0.26%	0.52%	0.52%	0.00%	0.51%	0.51%	0.51%	0.51%
1971	0.00%	0.25%	0.25%	0.25%	0.50%	0.74%	0.25%	0.25%	0.00%	0.25%	0.00%	0.49%
1972	0.00%	0.49%	0.24%	0.24%	0.24%	0.24%	0.48%	0.24%	0.24%	0.48%	0.24%	0.24%
1973	0.24%	0.70%	0.93%	0.69%	0.69%	0.68%	0.23%	1.81%	0.22%	0.88%	0.66%	0.65%
1974	0.87%	1.29%	1.27%	0.42%	1.25%	0.82%	0.82%	1.21%	1.20%	0.99%	0.78%	0.78%
1975	0.39%	0.77%	0.38%	0.38%	0.57%	0.75%	1.12%	0.18%	0.55%	0.55%	0.73%	0.36%
1976	0.18%	0.36%	0.18%	0.36%	0.71%	0.53%	0.53%	0.53%	0.35%	0.52%	0.17%	0.34%
1977	0.52%	1.03%	0.68%	0.84%	0.50%	0.66%	0.49%	0.33%	0.33%	0.33%	0.49%	0.32%
1978	0.64%	0.64%	0.79%	0.79%	0.94%	1.09%	0.77%	0.46%	0.76%	0.90%	0.45%	0.45%
1979	0.89%	1.17%	1.01%	1.15%	1.27%	1.12%	1.11%	0.96%	1.08%	0.80%	0.93%	1.05%
1980	1.43%	1.41%	1.52%	1.12%	0.99%	1.10%	0.00%	0.73%	0.84%	0.95%	0.83%	0.94%
1981	0.81%	1.03%	0.68%	0.68%	0.79%	0.89%	1.10%	0.76%	0.98%	0.21%	0.32%	0.32%
1982	0.32%	0.32%	(0.11%)	0.42%	0.95%	1.25%	0.52%	0.21%	0.20%	0.31%	(0.20%)	(0.41%)
1983	0.20%	0.10%	0.00%	0.72%	0.61%	0.30%	0.40%	0.30%	0.50%	0.30%	0.20%	0.10%
1984	0.59%	0.49%	0.20%	0.49%	0.29%	0.29%	0.39%	0.38%	0.48%	0.29%	0.00%	0.00%
1985	0.19%	0.47%	0.38%	0.47%	0.37%	0.28%	0.19%	0.19%	0.28%	0.37%	0.28%	0.28%
1986	0.27%	(0.27%)	(0.46%)	(0.18%)	0.28%	0.55%	0.00%	0.18%	0.46%	0.09%	0.09%	0.09%
1987	0.63%	0.36%	0.45%	0.54%	0.35%	0.35%	0.26%	0.53%	0.52%	0.26%	0.09%	0.00%
1988	0.26%	0.26%	0.43%	0.52%	0.34%	0.43%	0.42%	0.42%	0.67%	0.33%	0.08%	0.17%
1989	0.50%	0.41%	0.58%	0.65%	0.57%	0.24%	0.24%	0.16%	0.32%	0.48%	0.24%	0.16%
1990	1.03%	0.47%	0.55%	0.16%	0.23%	0.54%	0.38%	0.92%	0.84%	0.60%	0.22%	0.00%
1991	0.60%	0.15%	0.15%	0.15%	0.30%	0.29%	0.15%	0.29%	0.44%	0.15%	0.29%	0.07%
1992	0.15%	0.36%	0.51%	0.14%	0.14%	0.36%	0.21%	0.28%	0.28%	0.35%	0.14%	(0.07%)
1993	0.49%	0.35%	0.35%	0.28%	0.14%	0.14%	0.00%	0.28%	0.21%	0.41%	0.07%	0.00%
1994	0.27%	0.34%	0.34%	0.14%	0.07%	0.34%	0.27%	0.40%	0.27%	0.07%	0.13%	0.00%
1995	0.40%	0.40%	0.33%	0.33%	0.20%	0.20%	0.00%	0.26%	0.20%	0.33%	(0.07%)	(0.07%)
1996	0.59%	0.32%	0.52%	0.39%	0.19%	0.06%	0.19%	0.19%	0.32%	0.32%	0.19%	0.00%
1997	0.32%	0.31%	0.25%	0.12%	(0.06%)	0.12%	0.12%	0.19%	0.25%	0.25%	(0.06%)	(0.12%)
1998	0.19%	0.19%	0.19%	0.18%	0.18%	0.12%	0.12%	0.12%	0.12%	0.24%	0.00%	(0.06%)
1999	0.24%	0.12%	0.30%	0.73%	0.00%	0.00%	0.30%	0.24%	0.48%	0.18%	0.06%	0.00%
2000	0.30%	0.59%	0.82%	0.06%	0.12%	0.52%	0.23%	0.00%	0.52%	0.17%	0.06%	(0.06%)
2001	0.63%	0.40%	0.23%	0.40%	0.45%	0.17%	(0.28%)	0.00%	0.45%	(0.34%)	(0.17%)	(0.39%)
2002	0.23%	0.40%	0.56%	0.56%	0.00%	0.06%	0.11%	0.33%	0.17%	0.17%	0.00%	(0.22%)
2003	0.44%	0.77%	0.60%	(0.22%)	(0.16%)	0.11%	0.11%	0.38%	0.33%	(0.11%)	(0.27%)	(0.11%)
2004	0.49%	0.54%	0.64%	0.32%	0.59%	0.32%	(0.16%)	0.05%	0.21%	0.53%	0.05%	(0.37%)
2005	0.21%	0.58%	0.78%	0.67%	(0.10%)	0.05%	0.46%	0.51%	1.22%	0.20%	(0.80%)	(0.40%)
2006	0.76%	0.20%	0.55%	0.85%	0.50%	0.20%	0.30%	0.20%	(0.49%)	(0.54%)	(0.15%)	0.15%
2007	0.31%	0.54%	0.91%	0.65%	0.61%	0.19%	(0.03%)	(0.18%)	0.28%	0.21%	0.59%	(0.07%)
2008	0.50%	0.29%	0.87%	0.61%	0.84%	1.01%	0.53%	(0.40%)	(0.14%)	(1.01%)	(1.92%)	(1.03%)
2009	0.44%	0.50%	0.24%	0.25%	0.29%	0.86%	(0.16%)	0.22%	0.06%	0.10%	0.07%	(0.18%)
2010	0.34%	0.02%	0.41%	0.17%	0.08%	(0.10%)	0.02%	0.14%	0.06%	0.12%	0.04%	0.17%
2011	0.48%	0.49%	0.98%	0.64%	0.47%	(0.11%)	0.09%	0.28%	0.15%	(0.21%)	(0.08%)	(0.25%)
2012	0.44%	0.44%	0.76%	0.30%
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec